The tub itself is naturally designed to hold more water, so the drain can be smaller without fear of the water overflowing and flooding the rest of the bathroom. 
Then follow these guidelines to make sure your remodel abides by the proper plumbing codes. It doesn't matter if the drawing had the detail or not. Use silicone caulk to seal the liner to the drain flange, then trim away the liner around the drain opening. After all, drainpipes that are not properly vented will run sluggishly and could release noxious fumes into the house. For most standard shower trays and pans, they are already outfitted for a two-inch pipe, so there may not be much of an option. . It is imperative to use a larger shower drain pipe size to keep the water flowing into your pipes instead of onto the surrounding floor. The codes are written for the 'what if' situations after lots of experiencethey sometimes change as new materials and experience dictates. Keep in mind that the local building codes and shower drain size code for your area may be slightly different. We get it, but (1) terrylove.com can't live without ads, and (2) ad blockers can cause issues with videos and comments. Installing a new shower is a must-have item in these new areas, so it makes sense that many people are wondering what the standard size pipe is for a shower drain. Understood. 
1. Begin by disassembling all parts of the drain assembly. This is where the local building codes that specify smaller drain sizes come in handy. 2. As a general rule, you can run -inch pipe to most fixtures; run -inch pipe to a hose bib or a water heater. 1. She has vast experience with digital publishing, including SEO, photoshoot production, video production, eCommerce content, print collaboration, and custom sales content. What is the standard size pipe for a shower drain then? In the case of a tub that contains an internal lever waste stopper, the drain opening should be equipped with a trim cover, which is the small flat metal cover with all the little holes in it. https://codes.iccsafe.org/content/VRC2012/chapter-27-plumbing-fixtures.
This exception only applies where one shower head rated at 2.5 gpm is installed. We've updated our Privacy Policy, which will go in to effect on September 1, 2022. A shower tub drain has a 2 drain connection, while a tub drain often has a 1 drain connection. Generate a code sheet that integrates with your drawing set. If you need a little guidance on how to best install a shower drain pipe that will work efficiently and keep your shower from overflowing, there are a few things you need to know. Pipes that are glued without primer eventually will leak.
All you have to do is glue in a reducer to make the opening slightly smaller. If You Have No Hot Water Pressure, Heres What You Should Do. This piece usually has male threads that screw down into the female threads of the middle flange. So, if you are converting from a tub and shower combination to a shower, you'll likely have to change the drain pipe size.
Some states and cities only require a 1.5-inch shower drain pipe, but you may still want to consider going with the two-inch size. This is usually sufficiently large enough to keep even the shallowest shower tray from overflowing. Blow out bowls, as defined in ANSI/ASME A112.19.2M, Section 5.1.2.3 may have a maximum water use of 3.5 gallons per flush or 13.25 liters per flush. Spread a thin layer of solvent glue on the same surfaces.
Sections 422.1 through 422.5 and Table 422.1 are not adopted. For example, what is the right shower drain pipe size? Toilet rooms containing two (2) or more water closets or a combination of one (1) water closet and one (1) urinal, except in a dwelling unit. For example, many showers are now being built with multiple heads and water that sprays from all angles. The liner will be tightly sandwiched between the flanges. But, they found that some 'what if' situations could be bypassed if it was increased to a 2" pipe, so that's what the new codes generally require. He specializes in estimating as well as design and engineering for plumbing systems, and he works for one of New York's largest union plumbing construction companies. Unpack the code through illustrations and descriptions. If you interpret the code literally, then the shower WILL have a 2" drain outlet, and to use 1 1/2" piping you would have to "reduce the size in the direction of flow" which is NOT permitted. Up here in Canada we have smaller water particles that move faster because of the cold! Thanks to everyone that responded. 411.2.3 Flushometer Valve Activated Water Closets. If any particular ad is your REASON for blocking ads, please let us know. Highlight differences between any two building codes. 407.2.1.2 Lavatory Faucets in Common and Public Use Areas. Emergency use showers shall be exempt from the maximum water usage rates. There are several options when choosing a shower drain. From the floor below the shower base, spread plastic pipe primer around the outside edge of the drainpipe and around the inner surface of the smooth socket on the lower drain body. Follow the manufacturer's recommendations for adjusting the drainpipe to the proper height. Allow the silicone to cure for a full 24 hours before using the shower. Caitlin regularly attends trade shows and industry press conferences for market research and continued education. The tile should be grouted, sealed, and cured before you use the shower. Water hammer arresters might be required for appliances such as a washing machine. Once drain lines are assembled, an inspector will probably test to make sure they do not leak. According to most codes, copper supply pipe must be supported every 6 feet, galvanized or black steel pipe every 12 feet, PVC or ABS drainpipe every 4 feet, and cast-iron pipe every 5 feet. Laundry rooms in commercial buildings and common laundry facilities in multifamily dwelling buildings. Use approved clamps or straps to secure pipes. These are the flexible lines that run from the stop valve to a faucet, fixture, or appliance. 2. Due to the lack of limits, a 2 drain and trap are prescribed. Standalone shower tub drains, a tub and bathtub, and shower combination drain cant be used interchangeably. A reliable and up-to-date source of codes. Then, thread the lower body of the drain assembly onto the upper body. And just to make it interesting, the inspector will have a 3rd totally different interpretation of the code. Carefully set aside the cardboard friction washer and the rubber sealing washer. Plumbing Forum, Professional & DIY Advice, Tub/shower to Shower conversion - before I dig. If you have aplastic drainpipe, make sure to match the shower drain to the type of plastic in the drain system. Attach the metal grate to the top of the drain assembly. To be safe, install more supports than are required.
As a result, most building codes will require this size drain pipe for every shower. If we had a 1-1/2drain opening somebody can inadvertently stand on the drain opening without realizing it, and maybe drop a washrag on the drain opening and the water will rapidly build up and overflow over the threshold. Most shower pans or trays are going to be fitted with a two-inch pipe. To ensure adequate water pressure, you might need to replace an existing globe shutoff valve with a full-bore ball or gate valve that does not impede the flow of water. Aaron Stickley is a licensed plumber with 15 years of experience in commercial, new residential plumbing, and residential service and repair. Drain assemblies for custom-tiled showers are three-piece units, each of which is installed at different phases of the tile pan installation. I especially enjoyed the information about water particle size and speed. You can simply remove the cap to access the blockage or debris inside the pipe. Code calculators automatically generate a detailed list of requirements. Usually, this involves a second layer of mortar, then ceramic tile applied over the mortar.
Shower stalls, on the other hand, are or tend to be commercial and institutional in character or are subject to customization. Or whether the plan reviewer or inspector caught it or not. On the other hand, a shower pan should have a minimum of a inches per foot pitch towards the drain opening and the threshold should be a mere 2-inches above the finished height of the drain opening. List fittings in detail on your plumbing plan so you will be sure to purchase the right ones. Each type of drain assembly has its own installation method: Compression-type shower drains attach to the home drain pipes with compression washers and nuts. The code book is a wonderful thing. Water closets with bed pan washers may have a maximum water use of 3.5 gallons per flush or 13.25 liters per flush. The drain has to be sized for the incoming water when the installation departs from what the code sets forth as common fixtures. It is better to get their expert opinion upfront than to install a drain size that is too small, and that can cause major issues in your bathroom. Quickly locate sections across your jurisdiction. Without a dielectric union (shown above), the joint between galvanized and copper pipe would quickly corrode. Thread the mounting nut onto the tailpiece and tighten it down with channel-lock pliers. Under both the International Residential Code (IRC) and the Uniform Plumbing Code (UPC) the standard size for a tub drain and P-trap is 1 to 1/2 inches and under the IRC the tub waste arm (drain line) maybe 1 to 1/2 inches but under the UPC (Uniform Plumbing Code) a 1 to 1/2 inches drain line is limited to 1dfu (drainage fixture unit) whereas under the Uniform Plumbing Code (UPC) a tub is rated at 2dfus, therefore under the UPC the tub fixture arm must be 2 inches. Tub manufacturers make tubs with 1.5 inches drains, so this is accepted practice. Inspectors will have specific fitting requirements for different fixtures. A 1.5-inch drain is usually sufficient enough to keep the water moving through the shower without allowing it to get too backed up. The clear space in front of a water closet, lavatory or bidet in dwelling units and sleeping units shall be not less than 21 inches (533 mm). Trimming the drain pipe can be done with a hacksaw or plastic tubing cutter. They may wonder whether this two-inch shower drain pipe size still applies to their unique situation. You may have to test-fit the shower base to mark the right height, then remove the base to cut the pipe. In a residential dwelling unit where a 2 inch waste is not readily available and approval of the AHJ has been granted, the waste outlet, fixture tailpiece, trap and trap arm may be 1-1/2 inch when an existing tub is being replaced by a shower sized per Section 408.6(2). These fixtures require -inch tubes. With this, you can make your tub a floor-level sink.
Be sure you have all of the essential supplies on hand if you intend on replacing drains. When installing a compression shower drain, the drain fitting is normally installed into the shower base before the base is laid into position. For example, your bathroom might have a 2 drain and 3 drainage pipe. As you tighten, the rubber gasket is compressed against the drainpipe, creating a watertight seal. Compression-style drain assemblies are available in ABS, PVC, or brass, though PVC is gradually becoming the most popular. If old galvanized pipes and gate valves cause low water pressure, you might need to change them in order to supply new pipes with enough pressure. For many drain fittings, this means trimming off the pipe at the exact level of the subfloor. Most solvent-glued shower drain assemblies come in several parts: a strainer cover; an upper body that extends down through the drain opening in the shower base; and a lower piece with female threads that screw onto the upper body, with a smooth female socket that is glued onto the drain pipe. Immediately set the upper body of the drain assembly into the drain opening and press down. Here lately I've seen more wrong shower pans than right shower pans. Thanks. Beautiful Bathroom Colors For Your Next Renovation. This is what we have to go by here in California: Looks like we have a number of responses but the original poster was sent away to get a code question answered at a tile forum. The National Uniform Plumbing Code applies generally to the entire country. A 2-inchpipe is the recommended size because showers have a low threshold for flooding, and a 2-inch pipe helps the water drain faster than does a 1 1/2-inch pipe. As a general rule, run -inch supply lines to all fixtures except toilets and bathroom sinks. After this is done, a bed of mortar is troweled around the drain opening, creating a 1/4-inch-per-foot slope away from the walls and toward the drain. If you have any concerns about whether your shower would be okay with a small drain pipe size, make sure to consult a professional first. I think we have beat this one up enough. While many master bathroom remodels have beautiful walk-in showers, some people are still interested in installing a new shower and tub combination. You must log in or register to reply here. He has to do it by the code. It looks like you're using an ad blocker. Solvent-glued drain assemblies are recommended only when you have access below the shower from an unfinished basement or crawlspace. Many people wish they could add a new and more luxurious shower to their bathroom, but they need a little help with the technical details. If you'd like to support the site, please allow ads. He started his own residential service and repair plumbing business. Tile, pan-beds, area showers, and the like. Compression-style drains usually come with a fitting tool that helps you tighten the nut frominsideof the drain using a screwdriver. A few instances of flooding can spell major problems for your flooring and subflooring, so you want to do everything possible to prevent this. Some plumbing codes require you to verify that primer was used. 408.2.1 Multiple Showerheads Serving One Shower. If the pressure is low, you might need a booster pump. What Size Nails Do I Need for Baseboards? For a better experience, please enable JavaScript in your browser before proceeding.
You can find out more and change our default settings with Cookies Settings. Valves, fixture controls, cleanouts, and compression pipe fittings must not be covered by a wall or floor surface in case you need to work on them in the future. You can install a two-inch shower pipe drain in a shower-tub combination if you want the bottom of the tub to be relatively free of excess water. Builders and handy homeowners can often get away with installing smaller drains in these combinations. This style is generally easier to install than solvent-glued drains, especially if you don't have basement or crawlspace access to the area below the shower base. It may be as much as 1 1/2 inches if you are laying tile on a solid mortar bed. Understanding that the tailpiece is 1-inches to inches it then stands that the cross-sectional area of the tailpiece is 2.25-inches If we make a cover with -inches diameter holes then we need to have at least 36 holes. If your building code only requires a 1.5-inch drain pipe size and you do not want to go with the two-inch that most shower trays are built to accommodate, you still have other options. P2709.4.1 Plumbing Fixtures, Waste Fittings, P2503.6 Plumbing Administration, Shower Liner Test, 421.4 Fixtures, Faucets and Fixture Fittings, Shower Compartments. Kevin Sharp has a bachelor's degree in journalism from Illinois State University. Some inspectors will simply pour water through the pipes. Richard Epstein is a licensed master plumber with over 40 years experience in residential and commercial plumbing. Solvent-glued shower drain assemblies are usually PVC plastic, though older ones may use ABS plastic. Caitlin graduated with a bachelor of journalism, with an emphasis in magazine editing, as well as a minor in textile and apparel management from the University of Missouri-Columbia. If this contractor has a license, then he is bound to following the law (the code). If using a hacksaw, make sure to make the cut so it is flat and level. Codes might require that vent pipes slope 1/8 inch per foot. All faucets and toilets must have individual stop valves. Most shower pans or trays are going to be fitted with a two-inch pipe. To be safe, install a cleanout whenever you tap into a drain line unless there is already one nearby. Leverage the full code compliance platform. Now you are ready for the rest of the ceramic tile installation. I go there now, thanks. Before we dive into the specifics of exactly what the building codes require, it is important to understand why you need a larger shower drain pipe size. When the mortar bed has dried, a waterproof membrane liner is installed over the floor and the lower flange of the shower drain. 2. The tub can drain at leisure and the shower function when in utilize, with flow-limiting showerheads, fall within the flow rate that a 1.5 drain can handle. I will ask the inspector, but unfortunately in our town he is part time and not quickly reachable, so I was trying to see if someone here had any first hand experience in NJ. Cutting a notch in a joist greatly weakens it. Check local building codes. Running a drain across a room that does not have a basement or crawlspace might call for careful calculations. 1. Get daily tips and tricks for making your best home. It may not display this or other websites correctly. Thread the compression nut into the drain opening and tighten it. Here are some other important plumbing code considerations to keep in mind during your remodel: Adhere to these plumbing code requirements to ensure your kitchen or bathroom renovation goes smoothly. Unfortunately, this may not be a sufficient size to keep your shower from flooding and overflowing onto your bathroom floor. Determine the correct pipe materials. We've updated our Privacy Policy, which will go in to effect on September 1, 2022. By having a 2-inches drain then, it becomes essential to have 64 -inches holes in the trim cover, and letting for enough metal to offer the essential strength in the trim cover, the diameter of the trim cover is now 3 -inches to 4-inches. Have the plans approved before starting work and perform all work to the satisfaction of the inspector. The inspector can require that you reinforce joists that have been cut to accommodate pipes. The shower drains all used to be 1.5", and there's a lot of them still out there, working okay. A plumber can make sure the plumbing outlets meet the plumbing code.
A tub with a shower, is still a tub, and 1.5" works since it has an overflow and a lot more room for water storage before it can overflow a curb and into the room. Plumbing codes call for cleanouts at various points so drains can be easily augered in case of a clog.
Seriously, I totally understand that code in minimum and why 2" is preferred. When changing pipe materials, use the correct transition fitting. Other inspectors require that the line be plugged with an inflatable drain plug and the system filled with water. Keep in mind how much water you have spraying into the shower before you decide to go with the bare minimum. Determine the correct pipe sizes for drains, vents, and supply lines. Wipe away any excess silicone. Spray sprinkler bodies specifically excluded from the scope of the environmental protection agency water sense program product specification for spray sprinkler bodies. Current plumbing codes (IPC as well as MA Plumbing Code 248 CMR 10 for instance) need 1.5 inches to drain for a tub with a shower. Some codes allow level vents. I'm guessing you are under the 2012 Virginia Residential Code. A tub with a shower, is still a tub, and 1.5" works since it has an overflow and a lot more room for water storage before it can overflow a curb and into the room. Carefully position the shower base so the drainpipe extends up into the drain assembly. By carefully arranging those holes in a circular pattern they can make the overall diameter of the trim cover 1-3/8 inches or 1-7/16 inches. When planning your kitchen or bathroom project, request information about local plumbing codes from your local building department. Your choice depends on your shower base, thetype of pipesyou have in your home, and the manufacturers recommendations for both the shower pan and the drain. Any of these material types can be used with steel, fiberglass, or acrylicshower bases. The installation of paper dispensers or accessibility grab bars shall not be considered obstructions. A shower uses a floor drain, which directly removes wastewater from the shower instantaneously as you bathe. However, it will allow some extra water to splash around your feet and the bottom of the tub while showering. How Do You Utilize It. This is critical in a bathroom, where space might be at a premium. It doesnt have to be piped from the shower outlet to the plumbing drain system, like a tub drain requirements. 1. See Section P2709.3: Were there any plans showing a design detail?? But what I quoted specifically refers to a shower. JavaScript is disabled. If a tile professional is installing your custom shower base, they will handle the drain installation as part of the process. For a better experience, please enable JavaScript in your browser before proceeding. 1. How to Install Plumbing Vent Lines in Your Bathroom, How to Create a Kitchen or Bathroom Plumbing Layout Drawing, How to Install an Upflush Toilet in Your Basement, Everything You Need to Know About Venting for Successful DIY Plumbing Work, How to Run Pipes Through Walls and Floors for DIY Plumbing Work, How to Install an Air Admittance Valve to Keep Your Sink Draining Properly, How to Build a Shower Enclosure for Your DIY Bathroom Remodel, The 10 Best Bidet Attachments You Can Add to Your Existing Toilet, What to Know About Residential Electrical Codes to Safely Power Your Home, How to Plan the Best Bathroom Layout for Your Space. I was just trying to find where in the code it says 2", because the only reference I could find was 1.5". The installation of plumbing must not weaken the structure of a house.
You are using an out of date browser. If you don't have this access, a compression-style drain assembly is a better choice. Basically, to answer your question, somewhere in the code is an "exception" or a footnote or a comment or a drawing that will inform you that 1 1/2 drain is fine if youre talking about a tub/shower with single shower head. but a shower stall would require the 2 inch drain. Rapidly and efficiently calculate project parameters. The drain connection for your tub is similar to the one for your sink, whereas the shower drain connection is slightly larger. not less than 70 inches (1778 mm) above the. The truth is that things do look a little different when you are looking at this sort of combination. Make sure pipes are up to code by adhering to these guidelines. Whenever possible, bore holes through joists instead. Place the soft rubber compression gasket down into the drain opening so it fits around the drainpipe. Consider how much water flow you will have in your shower and the construction of the shower pan or tub to determine what is best for your home. Don't miss relevant code. If you dont like the idea of having soapy water at your feet while you shower, it is advised that you still opt for the larger drain size. The problem is that a foot of an adult is enough that if the person taking a shower was to stand directly on the drain opening their foot can cover all the holes and water cant drain out. How to Install a Compression-Style Shower Drain, How to Install a Solvent-Glued Shower Drain, Insert the Upper Body of the Drain Assembly, Solvent Glue the Drainpipe to the Drain Assembly, The 10 Best Comfortable Non-Slip Mats of 2022, How to Install a Shower Pan in Your Bathroom, How to Fix a Shower Pan That Flexes or Moves, Learn How to Fix a Leaky Bathtub Overflow Tube, How to Install a Toilet Flange Extender to Fix Toilet Leaks, How to Install a Stopper Drain in Your Bathtub, How to Easily Install the Ikea Dalskar Faucet in Your Bathroom, The Right Way to Use a Standard Drain Plunger, Here Are 5 Easy Ways to Fix a Leaky PVC Pipe, How to Install a Floor Drain for the Laundry Room, Install Your Own Tub or Shower Surround Kit. From below the shower base, place the rubber sealing gasket, then the paper friction gasket, over the male threads of the upper body.
Then follow these guidelines to make sure your remodel abides by the proper plumbing codes. It doesn't matter if the drawing had the detail or not. Use silicone caulk to seal the liner to the drain flange, then trim away the liner around the drain opening. After all, drainpipes that are not properly vented will run sluggishly and could release noxious fumes into the house. For most standard shower trays and pans, they are already outfitted for a two-inch pipe, so there may not be much of an option. . It is imperative to use a larger shower drain pipe size to keep the water flowing into your pipes instead of onto the surrounding floor. The codes are written for the 'what if' situations after lots of experiencethey sometimes change as new materials and experience dictates. Keep in mind that the local building codes and shower drain size code for your area may be slightly different. We get it, but (1) terrylove.com can't live without ads, and (2) ad blockers can cause issues with videos and comments. Installing a new shower is a must-have item in these new areas, so it makes sense that many people are wondering what the standard size pipe is for a shower drain. Understood. 1. Begin by disassembling all parts of the drain assembly. This is where the local building codes that specify smaller drain sizes come in handy. 2. As a general rule, you can run -inch pipe to most fixtures; run -inch pipe to a hose bib or a water heater. 1. She has vast experience with digital publishing, including SEO, photoshoot production, video production, eCommerce content, print collaboration, and custom sales content. What is the standard size pipe for a shower drain then? In the case of a tub that contains an internal lever waste stopper, the drain opening should be equipped with a trim cover, which is the small flat metal cover with all the little holes in it. https://codes.iccsafe.org/content/VRC2012/chapter-27-plumbing-fixtures. This exception only applies where one shower head rated at 2.5 gpm is installed. We've updated our Privacy Policy, which will go in to effect on September 1, 2022. A shower tub drain has a 2 drain connection, while a tub drain often has a 1 drain connection. Generate a code sheet that integrates with your drawing set. If you need a little guidance on how to best install a shower drain pipe that will work efficiently and keep your shower from overflowing, there are a few things you need to know. Pipes that are glued without primer eventually will leak.
All you have to do is glue in a reducer to make the opening slightly smaller. If You Have No Hot Water Pressure, Heres What You Should Do. This piece usually has male threads that screw down into the female threads of the middle flange. So, if you are converting from a tub and shower combination to a shower, you'll likely have to change the drain pipe size.
Some states and cities only require a 1.5-inch shower drain pipe, but you may still want to consider going with the two-inch size. This is usually sufficiently large enough to keep even the shallowest shower tray from overflowing. Blow out bowls, as defined in ANSI/ASME A112.19.2M, Section 5.1.2.3 may have a maximum water use of 3.5 gallons per flush or 13.25 liters per flush. Spread a thin layer of solvent glue on the same surfaces.
Sections 422.1 through 422.5 and Table 422.1 are not adopted. For example, what is the right shower drain pipe size? Toilet rooms containing two (2) or more water closets or a combination of one (1) water closet and one (1) urinal, except in a dwelling unit. For example, many showers are now being built with multiple heads and water that sprays from all angles. The liner will be tightly sandwiched between the flanges. But, they found that some 'what if' situations could be bypassed if it was increased to a 2" pipe, so that's what the new codes generally require. He specializes in estimating as well as design and engineering for plumbing systems, and he works for one of New York's largest union plumbing construction companies. Unpack the code through illustrations and descriptions. If you interpret the code literally, then the shower WILL have a 2" drain outlet, and to use 1 1/2" piping you would have to "reduce the size in the direction of flow" which is NOT permitted. Up here in Canada we have smaller water particles that move faster because of the cold! Thanks to everyone that responded. 411.2.3 Flushometer Valve Activated Water Closets. If any particular ad is your REASON for blocking ads, please let us know. Highlight differences between any two building codes. 407.2.1.2 Lavatory Faucets in Common and Public Use Areas. Emergency use showers shall be exempt from the maximum water usage rates. There are several options when choosing a shower drain. From the floor below the shower base, spread plastic pipe primer around the outside edge of the drainpipe and around the inner surface of the smooth socket on the lower drain body. Follow the manufacturer's recommendations for adjusting the drainpipe to the proper height. Allow the silicone to cure for a full 24 hours before using the shower. Caitlin regularly attends trade shows and industry press conferences for market research and continued education. The tile should be grouted, sealed, and cured before you use the shower. Water hammer arresters might be required for appliances such as a washing machine. Once drain lines are assembled, an inspector will probably test to make sure they do not leak. According to most codes, copper supply pipe must be supported every 6 feet, galvanized or black steel pipe every 12 feet, PVC or ABS drainpipe every 4 feet, and cast-iron pipe every 5 feet. Laundry rooms in commercial buildings and common laundry facilities in multifamily dwelling buildings. Use approved clamps or straps to secure pipes. These are the flexible lines that run from the stop valve to a faucet, fixture, or appliance. 2. Due to the lack of limits, a 2 drain and trap are prescribed. Standalone shower tub drains, a tub and bathtub, and shower combination drain cant be used interchangeably. A reliable and up-to-date source of codes. Then, thread the lower body of the drain assembly onto the upper body. And just to make it interesting, the inspector will have a 3rd totally different interpretation of the code. Carefully set aside the cardboard friction washer and the rubber sealing washer. Plumbing Forum, Professional & DIY Advice, Tub/shower to Shower conversion - before I dig. If you have aplastic drainpipe, make sure to match the shower drain to the type of plastic in the drain system. Attach the metal grate to the top of the drain assembly. To be safe, install more supports than are required.
As a result, most building codes will require this size drain pipe for every shower. If we had a 1-1/2drain opening somebody can inadvertently stand on the drain opening without realizing it, and maybe drop a washrag on the drain opening and the water will rapidly build up and overflow over the threshold. Most shower pans or trays are going to be fitted with a two-inch pipe. To ensure adequate water pressure, you might need to replace an existing globe shutoff valve with a full-bore ball or gate valve that does not impede the flow of water. Aaron Stickley is a licensed plumber with 15 years of experience in commercial, new residential plumbing, and residential service and repair. Drain assemblies for custom-tiled showers are three-piece units, each of which is installed at different phases of the tile pan installation. I especially enjoyed the information about water particle size and speed. You can simply remove the cap to access the blockage or debris inside the pipe. Code calculators automatically generate a detailed list of requirements. Usually, this involves a second layer of mortar, then ceramic tile applied over the mortar.
Shower stalls, on the other hand, are or tend to be commercial and institutional in character or are subject to customization. Or whether the plan reviewer or inspector caught it or not. On the other hand, a shower pan should have a minimum of a inches per foot pitch towards the drain opening and the threshold should be a mere 2-inches above the finished height of the drain opening. List fittings in detail on your plumbing plan so you will be sure to purchase the right ones. Each type of drain assembly has its own installation method: Compression-type shower drains attach to the home drain pipes with compression washers and nuts. The code book is a wonderful thing. Water closets with bed pan washers may have a maximum water use of 3.5 gallons per flush or 13.25 liters per flush. The drain has to be sized for the incoming water when the installation departs from what the code sets forth as common fixtures. It is better to get their expert opinion upfront than to install a drain size that is too small, and that can cause major issues in your bathroom. Quickly locate sections across your jurisdiction. Without a dielectric union (shown above), the joint between galvanized and copper pipe would quickly corrode. Thread the mounting nut onto the tailpiece and tighten it down with channel-lock pliers. Under both the International Residential Code (IRC) and the Uniform Plumbing Code (UPC) the standard size for a tub drain and P-trap is 1 to 1/2 inches and under the IRC the tub waste arm (drain line) maybe 1 to 1/2 inches but under the UPC (Uniform Plumbing Code) a 1 to 1/2 inches drain line is limited to 1dfu (drainage fixture unit) whereas under the Uniform Plumbing Code (UPC) a tub is rated at 2dfus, therefore under the UPC the tub fixture arm must be 2 inches. Tub manufacturers make tubs with 1.5 inches drains, so this is accepted practice. Inspectors will have specific fitting requirements for different fixtures. A 1.5-inch drain is usually sufficient enough to keep the water moving through the shower without allowing it to get too backed up. The clear space in front of a water closet, lavatory or bidet in dwelling units and sleeping units shall be not less than 21 inches (533 mm). Trimming the drain pipe can be done with a hacksaw or plastic tubing cutter. They may wonder whether this two-inch shower drain pipe size still applies to their unique situation. You may have to test-fit the shower base to mark the right height, then remove the base to cut the pipe. In a residential dwelling unit where a 2 inch waste is not readily available and approval of the AHJ has been granted, the waste outlet, fixture tailpiece, trap and trap arm may be 1-1/2 inch when an existing tub is being replaced by a shower sized per Section 408.6(2). These fixtures require -inch tubes. With this, you can make your tub a floor-level sink.
Be sure you have all of the essential supplies on hand if you intend on replacing drains. When installing a compression shower drain, the drain fitting is normally installed into the shower base before the base is laid into position. For example, your bathroom might have a 2 drain and 3 drainage pipe. As you tighten, the rubber gasket is compressed against the drainpipe, creating a watertight seal. Compression-style drain assemblies are available in ABS, PVC, or brass, though PVC is gradually becoming the most popular. If old galvanized pipes and gate valves cause low water pressure, you might need to change them in order to supply new pipes with enough pressure. For many drain fittings, this means trimming off the pipe at the exact level of the subfloor. Most solvent-glued shower drain assemblies come in several parts: a strainer cover; an upper body that extends down through the drain opening in the shower base; and a lower piece with female threads that screw onto the upper body, with a smooth female socket that is glued onto the drain pipe. Immediately set the upper body of the drain assembly into the drain opening and press down. Here lately I've seen more wrong shower pans than right shower pans. Thanks. Beautiful Bathroom Colors For Your Next Renovation. This is what we have to go by here in California: Looks like we have a number of responses but the original poster was sent away to get a code question answered at a tile forum. The National Uniform Plumbing Code applies generally to the entire country. A 2-inchpipe is the recommended size because showers have a low threshold for flooding, and a 2-inch pipe helps the water drain faster than does a 1 1/2-inch pipe. As a general rule, run -inch supply lines to all fixtures except toilets and bathroom sinks. After this is done, a bed of mortar is troweled around the drain opening, creating a 1/4-inch-per-foot slope away from the walls and toward the drain. If you have any concerns about whether your shower would be okay with a small drain pipe size, make sure to consult a professional first. I think we have beat this one up enough. While many master bathroom remodels have beautiful walk-in showers, some people are still interested in installing a new shower and tub combination. You must log in or register to reply here. He has to do it by the code. It looks like you're using an ad blocker. Solvent-glued drain assemblies are recommended only when you have access below the shower from an unfinished basement or crawlspace. Many people wish they could add a new and more luxurious shower to their bathroom, but they need a little help with the technical details. If you'd like to support the site, please allow ads. He started his own residential service and repair plumbing business. Tile, pan-beds, area showers, and the like. Compression-style drains usually come with a fitting tool that helps you tighten the nut frominsideof the drain using a screwdriver. A few instances of flooding can spell major problems for your flooring and subflooring, so you want to do everything possible to prevent this. Some plumbing codes require you to verify that primer was used. 408.2.1 Multiple Showerheads Serving One Shower. If the pressure is low, you might need a booster pump. What Size Nails Do I Need for Baseboards? For a better experience, please enable JavaScript in your browser before proceeding.
You can find out more and change our default settings with Cookies Settings. Valves, fixture controls, cleanouts, and compression pipe fittings must not be covered by a wall or floor surface in case you need to work on them in the future. You can install a two-inch shower pipe drain in a shower-tub combination if you want the bottom of the tub to be relatively free of excess water. Builders and handy homeowners can often get away with installing smaller drains in these combinations. This style is generally easier to install than solvent-glued drains, especially if you don't have basement or crawlspace access to the area below the shower base. It may be as much as 1 1/2 inches if you are laying tile on a solid mortar bed. Understanding that the tailpiece is 1-inches to inches it then stands that the cross-sectional area of the tailpiece is 2.25-inches If we make a cover with -inches diameter holes then we need to have at least 36 holes. If your building code only requires a 1.5-inch drain pipe size and you do not want to go with the two-inch that most shower trays are built to accommodate, you still have other options. P2709.4.1 Plumbing Fixtures, Waste Fittings, P2503.6 Plumbing Administration, Shower Liner Test, 421.4 Fixtures, Faucets and Fixture Fittings, Shower Compartments. Kevin Sharp has a bachelor's degree in journalism from Illinois State University. Some inspectors will simply pour water through the pipes. Richard Epstein is a licensed master plumber with over 40 years experience in residential and commercial plumbing. Solvent-glued shower drain assemblies are usually PVC plastic, though older ones may use ABS plastic. Caitlin graduated with a bachelor of journalism, with an emphasis in magazine editing, as well as a minor in textile and apparel management from the University of Missouri-Columbia. If this contractor has a license, then he is bound to following the law (the code). If using a hacksaw, make sure to make the cut so it is flat and level. Codes might require that vent pipes slope 1/8 inch per foot. All faucets and toilets must have individual stop valves. Most shower pans or trays are going to be fitted with a two-inch pipe. To be safe, install a cleanout whenever you tap into a drain line unless there is already one nearby. Leverage the full code compliance platform. Now you are ready for the rest of the ceramic tile installation. I go there now, thanks. Before we dive into the specifics of exactly what the building codes require, it is important to understand why you need a larger shower drain pipe size. When the mortar bed has dried, a waterproof membrane liner is installed over the floor and the lower flange of the shower drain. 2. The tub can drain at leisure and the shower function when in utilize, with flow-limiting showerheads, fall within the flow rate that a 1.5 drain can handle. I will ask the inspector, but unfortunately in our town he is part time and not quickly reachable, so I was trying to see if someone here had any first hand experience in NJ. Cutting a notch in a joist greatly weakens it. Check local building codes. Running a drain across a room that does not have a basement or crawlspace might call for careful calculations. 1. Get daily tips and tricks for making your best home. It may not display this or other websites correctly. Thread the compression nut into the drain opening and tighten it. Here are some other important plumbing code considerations to keep in mind during your remodel: Adhere to these plumbing code requirements to ensure your kitchen or bathroom renovation goes smoothly. Unfortunately, this may not be a sufficient size to keep your shower from flooding and overflowing onto your bathroom floor. Determine the correct pipe materials. We've updated our Privacy Policy, which will go in to effect on September 1, 2022. By having a 2-inches drain then, it becomes essential to have 64 -inches holes in the trim cover, and letting for enough metal to offer the essential strength in the trim cover, the diameter of the trim cover is now 3 -inches to 4-inches. Have the plans approved before starting work and perform all work to the satisfaction of the inspector. The inspector can require that you reinforce joists that have been cut to accommodate pipes. The shower drains all used to be 1.5", and there's a lot of them still out there, working okay. A plumber can make sure the plumbing outlets meet the plumbing code.
A tub with a shower, is still a tub, and 1.5" works since it has an overflow and a lot more room for water storage before it can overflow a curb and into the room. Plumbing codes call for cleanouts at various points so drains can be easily augered in case of a clog.
Seriously, I totally understand that code in minimum and why 2" is preferred. When changing pipe materials, use the correct transition fitting. Other inspectors require that the line be plugged with an inflatable drain plug and the system filled with water. Keep in mind how much water you have spraying into the shower before you decide to go with the bare minimum. Determine the correct pipe sizes for drains, vents, and supply lines. Wipe away any excess silicone. Spray sprinkler bodies specifically excluded from the scope of the environmental protection agency water sense program product specification for spray sprinkler bodies. Current plumbing codes (IPC as well as MA Plumbing Code 248 CMR 10 for instance) need 1.5 inches to drain for a tub with a shower. Some codes allow level vents. I'm guessing you are under the 2012 Virginia Residential Code. A tub with a shower, is still a tub, and 1.5" works since it has an overflow and a lot more room for water storage before it can overflow a curb and into the room. Carefully position the shower base so the drainpipe extends up into the drain assembly. By carefully arranging those holes in a circular pattern they can make the overall diameter of the trim cover 1-3/8 inches or 1-7/16 inches. When planning your kitchen or bathroom project, request information about local plumbing codes from your local building department. Your choice depends on your shower base, thetype of pipesyou have in your home, and the manufacturers recommendations for both the shower pan and the drain. Any of these material types can be used with steel, fiberglass, or acrylicshower bases. The installation of paper dispensers or accessibility grab bars shall not be considered obstructions. A shower uses a floor drain, which directly removes wastewater from the shower instantaneously as you bathe. However, it will allow some extra water to splash around your feet and the bottom of the tub while showering. How Do You Utilize It. This is critical in a bathroom, where space might be at a premium. It doesnt have to be piped from the shower outlet to the plumbing drain system, like a tub drain requirements. 1. See Section P2709.3: Were there any plans showing a design detail?? But what I quoted specifically refers to a shower. JavaScript is disabled. If a tile professional is installing your custom shower base, they will handle the drain installation as part of the process. For a better experience, please enable JavaScript in your browser before proceeding. 1. How to Install Plumbing Vent Lines in Your Bathroom, How to Create a Kitchen or Bathroom Plumbing Layout Drawing, How to Install an Upflush Toilet in Your Basement, Everything You Need to Know About Venting for Successful DIY Plumbing Work, How to Run Pipes Through Walls and Floors for DIY Plumbing Work, How to Install an Air Admittance Valve to Keep Your Sink Draining Properly, How to Build a Shower Enclosure for Your DIY Bathroom Remodel, The 10 Best Bidet Attachments You Can Add to Your Existing Toilet, What to Know About Residential Electrical Codes to Safely Power Your Home, How to Plan the Best Bathroom Layout for Your Space. I was just trying to find where in the code it says 2", because the only reference I could find was 1.5". The installation of plumbing must not weaken the structure of a house.
You are using an out of date browser. If you don't have this access, a compression-style drain assembly is a better choice. Basically, to answer your question, somewhere in the code is an "exception" or a footnote or a comment or a drawing that will inform you that 1 1/2 drain is fine if youre talking about a tub/shower with single shower head. but a shower stall would require the 2 inch drain. Rapidly and efficiently calculate project parameters. The drain connection for your tub is similar to the one for your sink, whereas the shower drain connection is slightly larger. not less than 70 inches (1778 mm) above the. The truth is that things do look a little different when you are looking at this sort of combination. Make sure pipes are up to code by adhering to these guidelines. Whenever possible, bore holes through joists instead. Place the soft rubber compression gasket down into the drain opening so it fits around the drainpipe. Consider how much water flow you will have in your shower and the construction of the shower pan or tub to determine what is best for your home. Don't miss relevant code. If you dont like the idea of having soapy water at your feet while you shower, it is advised that you still opt for the larger drain size. The problem is that a foot of an adult is enough that if the person taking a shower was to stand directly on the drain opening their foot can cover all the holes and water cant drain out. How to Install a Compression-Style Shower Drain, How to Install a Solvent-Glued Shower Drain, Insert the Upper Body of the Drain Assembly, Solvent Glue the Drainpipe to the Drain Assembly, The 10 Best Comfortable Non-Slip Mats of 2022, How to Install a Shower Pan in Your Bathroom, How to Fix a Shower Pan That Flexes or Moves, Learn How to Fix a Leaky Bathtub Overflow Tube, How to Install a Toilet Flange Extender to Fix Toilet Leaks, How to Install a Stopper Drain in Your Bathtub, How to Easily Install the Ikea Dalskar Faucet in Your Bathroom, The Right Way to Use a Standard Drain Plunger, Here Are 5 Easy Ways to Fix a Leaky PVC Pipe, How to Install a Floor Drain for the Laundry Room, Install Your Own Tub or Shower Surround Kit. From below the shower base, place the rubber sealing gasket, then the paper friction gasket, over the male threads of the upper body.