Bathtub drain flange sizes

Often the hardest part about plumbing is the rough-in. The last step of connecting the sink, toilet, or tub is almost superfluous. Get the rough-in right, and you are 90 percent of the way there. But it doesn't have to seem so daunting.

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In addition, fixture manufacturers typically provide rough-in specifications in their product literature. Always check the standard dimensions against the manufacturer's specs to make sure they will work for your installation. When speaking of plumbing dimensions, the term centerline is often used.

bathtub drain flange sizes

As with the term "on-center," which is used for construction, the term "centerline" is an imaginary vertical line drawn through a key reference point usually the drain pipe. For example, if two pipes are specified to be 10 inches apart, you measure 10 inches between the centers of the pipes, not 10 inches between the edges of the pipes. Another common term is the base floor height. Keep in mind that not all dimensions are set in stone; consider them general guidelines.

They will vary according to your bathroom. Consult the instructions that come with the fixture sink, tub, etc.

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Supply line height : Two holes; vertically, both are about 2 to 3 inches above the drain pipe Supply lines horizontal : Two holes; one hole is 4 inches to the right of centerline; other is 4 inches to left of centerline Discharge hole vertical : About 16 to 20 inches above the floor; consider drain pipe to be the vertical centerline Fixture side to side buffer : From centerline, 15 inches minimum, 20 inches recommended Fixture front buffer : Minimum distance to nearest obstruction is 21 inches; 30 inches recommended Placement of sink : Vertically, the sink should be about 31 inches above the floor, measured to the rim of the sink.

Read More.Bought a new tub? Remodeling a bathroom, or building a new one? There's a good chance you'll need a new drain and overflow assembly aka waste and overflow to complete the project. Whether you're simply matching the finish in a new color scheme, or need to accommodate an entirely new tub, you'll have to do a bit of measuring to ensure you select the right kit.

This could be as simple as measuring the old assembly, but when that's not possible, you'll have to go to the tub itself. Every tub has drainage tubing that connects to the home's drain pipes below, and most tubs have an overflow - that circular plate below the lip of the front wall of the tub that sometimes has a trip lever. With a freestanding tub, the tubing that connects the overflow and the tub drain to the waste pipes below is exposed; built-in alcove tubs have all of this neatly hidden.

bathtub drain flange sizes

While we all know what the drain is for, the overflow is a bit more mysterious for some. It's essentially just another hole in the tub, covered by a faceplate, through which water can exit.

It's intended to prevent flooding, though there is some debate as to its actual efficacy - with the faceplate attached the opening is rather small, casting doubt on its ability to remove water fast enough to keep up with a flowing tub spout our advice: never leave a filling tub unattended. Though most tubs sold in the US include an overflow hole, don't panic if yours doesn't - some municipal plumbing codes do not require one.

If you're looking to get a tub without an overflow, be sure to check with local code authorities before proceeding, lest you fail inspection. Of these, brass is the most durable and attractive, but will cost more. Aside from this, no material is really much better than another for the purpose being served.

Beware, though: local code may dictate what can be installed in your city or county. While your plumber should be aware of any applicable regulations, DIYers should check before purchasing online. And since most kits are sized to fit a range of tub sizes, finding a compatible assembly is made that much easier.

Helpful Hint: Have you checked your tub's paperwork? The manufacturer may have included sizing information for the drain and overflow assembly - no measuring necessary! A freestanding tub makes measuring easy, since everything is exposed. Built-in tubs can present a bit of a challenge, however. A properly-constructed bathroom will have an access panel in the alcove if applicableor the wall adjacent to the built-in tub's plumbing sometimes accessible from the next room or a closet.

If the location of this opening isn't obvious, try tapping any wood or tile that lies directly behind the front of the tub, or to the side - access panels can be expertly concealed and you'll need to listen for a hollow space. Although access panels aren't required by code in every situation, we believe they're essential.

Likewise, there are plenty of uniquely-shaped tubs out there that can make things difficult. For these situations, a flexible drain assembly will be your salvation! Measure straight down from the center of the overflow to the point at which the drain is mounted to the tub: depending on what's easiest to get to, you can measure from outside the tub down to its underside, or from inside the tub to the tub floor.

Do not follow the curve of the tub; measure straight down. As seen in the diagram above, the drain shoe is an elbow that lies directly below the tub drain, directing water from the tub into the horizontal pipe that leads to the bathroom drain line below the floor. You'll need to measure from the center of the drain to the "run" of the waste tee - where the overflow tube fits into it.

Measure from the bathroom floor to the top rim of the tub.Log in or Sign up. Joined: Sep 20, Location: Georgia.

bathtub drain flange sizes

Does anyone know of an online supply where I can order a 2 inch bathtub drain. I'm working on a house and need to replace the tub drain assembly. The old drain is a 2 inch yes I'm sure. Problem is I cant find one. Thx for the help. Husky DadMar 2, The "world wide" demand for a 2" tub drain appears to be the grand total of ONE.

It doesn't seem like there would be a lot of financial benefit to a company if they designed one, had the dies made, and then produced it. If they did, the production costs for that one drain would be in the hundreds of thousands of dollars, so guess what that drain would cost you. Can anyone out there actually help -? Apparently, arrogant, snarky and decidedly unhelpful responses are "allowed" on this site.

Methinks perhaps the moderator needs a moderator -? Not really. What did you want me to say?

Standard Bathtub Drain Dimensions

My answer was the same as if you had asked for a 4" sink strainer for an old Kohler sink. If that had been the case, you would also be out of luck. Manufacturers ONLY make things they can sell, and sell a lot of. As my economics professor once said, companies are NOT in the business of making things. They are in the business of making money, and to do THAT, they make things.

Last edited: Mar 2, HJ: "Not really. I have a tub drain I need to replace also.Although a shower and tub drain serve the same function -- to dispose of waste water into your pipe drainage system -- each one performs the task differently. A standalone shower drain and a tub or bathtub and shower combination drain cannot be used interchangeably.

If you are remodeling your bathroom and the project involves replacing your standalone shower with a tub, consider hiring a plumber to install the tub. He can ensure the plumbing outlets meet plumbing code. A shower uses a floor drain, which directly eliminates waste water from the shower instantaneously as you bathe. A tub drain requires you to manually close and open it with a lift-and-turn mechanism or a lever.

bathtub drain flange sizes

You push the mechanism down and turn it clockwise to close the drain when you want the tub to fill with water. Once you have finished bathing, you lift the mechanism up and turn it counterclockwise to open the drain and allow the water to drain.

A lever works pretty much the same way, except that you pull the lever up to close the drain and push it down to open. Shower and tub drains usually have different drain connection sizes to accommodate the various pipe sizes of your home's plumbing drain system.

The drain connection for your tub is generally the same as the one for your sink, whereas the shower drain connection is slightly larger.

Since a shower has a floor drain, waste water empties directly into the plumbing drain system. It does not have to be piped from the shower outlet to the plumbing drain system, like a tub drain requires. Ask the Builder says to think of your tub as a floor-level sink. A tub mandates that you install drain connections, similar to those found on your sink, for waste water to empty into your home's plumbing drain system. If you are in the process of converting your shower stall to a standalone tub or bathtub and shower combination, ensure the installation is to code.

A shower drain should pipe directly to a shower outlet, and a tub drain should pipe directly to a tub outlet. Without the correct drain pipe connections, waste water can drain from the tub and accumulate underneath it until it finds its way to the floor drain and eventually to the drainage system, which can create a health hazard.

Christie Gross has been writing since Her work writing public policy platforms for elected officials nationwide has been featured in national and local newspapers under various client pen names.Measuring for a bathtub drain may seem to be a daunting task but there are a few short steps you can take to ensure that you get the right fit.

Knowing where and how to access the plumbing to be able to measure it is half the battle. Once you locate this area, a few small measurements are all it takes to get you fitted for a new or replacement bathtub drain. Measure the drain hole in the bathtub with a tape measure and write that measurement down.

This will be the width measurement of your drain pipe. Remove the plumbing access panel located on the back of the wall that holds the faucet fixtures. Locate the plumbing that is installed for the drain pipe and overflow pipe.

Remove the old drain pipe, if it is still in place, by loosening the connecting bolts from the plumbing pipe and from the strainer device connected to the tub. Use a large adjustable wrench or a Channel-lock pliers for this.

Use a lubricant such as WD if you have difficulties loosening the bolts. Measure the old drain pipe to get a horizontal and vertical measurement. This will give you your length and width of the drain you need. Measure straight down from the bathtub drain hole to the level where the piping branches off towards the drain the plumbing pipe splits in two directions, the one for the overflow tank will go straight up, the other will branch towards the drain.

Write down the measurement for the vertical distance between the drain hole and the level where the piping branches off toward the drain. Measure from the piping section where it branches out toward the drain over to the drain hole and write that horizontal distance measurement down. That will give you the length and width that is needed for your drain.

Your local hardware or home improvement store should carry a bathtub drain that fits your needs. Connect your new bathtub drain with a large adjustable wrench or Channel-lock pliers. Make sure that it is on tight so it does not leak. If the drain fits properly--the connection between the tub and the main piping line up properly, as well as the new drain pipe connecting snugly to the tub--apply plumbers putty to the drain and secure into place to ensure that it does not leak.

Secure the strainer in place. Run some water through the drain before you replace the plumbing access panel to see whether everything is sealed properly and is not leaking. If it does not fit properly or it leaks, you have the wrong size. Measure again and exchange the drain until everything lines up and there are no leaks.

Susan Revermann is a professional writer with educational and professional experience in psychology, research and teaching. She holds a Bachelor of Arts from the University of Washington in psychology, focused on research, motivational behavior and statistics. Revermann also has a background in art, crafts, green living, outdoor activities and overall fitness, balance and well-being.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

It only takes a minute to sign up. My tub's drain flange has had the little cross piece inside it broken out, which means I cannot screw a grid drain into it.

Looking for a 2 inch bathtub drain assembly

Right now, it's totally open and an invitation for my toddler to drop stuff down. Not to mention lots of hair, etc. I believe I need to replace the drain flange and put a grid drain on top of that I want a grid drain like a shower instead of a typical tub stopper. I have measured the diameter across the drain at just under 2" which I believe means a pipe thread size of 1. However, I thought I remember learning that drains may be either coarse or fine threaded.

Before removing existing drain flange, is there any way to know if it is coarse or fine threaded, or are all 1. I want to be sure to order the correct part, whether I do the work or hire a plumber. I have never come across flanges that weren't compatible, and haven't seen manufacturers specify TPI on their kits or replacement parts. There are plenty of oddball pieces here and there but upon coming across those on rare occasionsI'd be replacing the entire assembly.

There is really no way to know the TPI without removing the flange, but chances are you will be dealing with coarse threads. For the record, there ARE different threads. I just bought a new flange only one type was available for sale in my neighbourhood which did match the thread count on the existing drain shoe.

Particularly annoying in that I was unable to purchase a new drain shoe.

Bathtub Drain Kit Installation (Step-by-Step)

Actually, the drain shoe is what I was really trying to purchase as the existing one had broken. I only bought the new flange only because the old one suffered mior damage to the cross piece during removal.

In the end, I had to clean up and repair the old drain shoe and then reuse the old flange. Caveat: My house is over fifty years old, and the drain shoe and flange in question are probably of similar vintage. Sign up to join this community. The best answers are voted up and rise to the top.

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Home Questions Tags Users Unanswered. Do tub drains of the same diameter ever have different thread-per-inch counts? Ask Question. Asked 6 years, 6 months ago. Active 1 year ago. Viewed 8k times. Tester k 62 62 gold badges silver badges bronze badges. Active Oldest Votes.

Ethereal Ethereal 4 4 silver badges 13 13 bronze badges. There's probably an American vs Metric thread version of these things. Not likely to be a problem if you buy in the tub's country of origin. There are different thread pitches I have run into this on acrylic tubs that come with a drain kit.

Purchased a replacement because the chrome was peeling and the size was correct but the pitch was not the same. Robert Morewood Robert Morewood 21 1 1 bronze badge. Niall C. Gregory Miller Gregory Miller 11 1 1 bronze badge. That's the perfect way to measure it. In my case, I had a flange with a different size and thread, I had to buy a thread adapter to fit a flange with another different thread.Since drain clogs are such a common plumbing problem, dealing with them can become expensive if you call a plumber to clear every stoppage.

A plunger works its magic by simple suction and pressure. When the rubber cup of the plunger is sealed down over the drain opening and the handle is moved up and down, the pressure of water forced up and down will dislodge most clogs and allow them to continue on through the drain pipes.

There are various types of plungers; each designed to be used on different types of drains. There is also a range of quality in plungers. When selecting a new plunger, make your choice based on how and where it will be used, and also on its quality. Selecting the right plunger can make using it correctly that much easier. And these are such inexpensive tools, that there's no reason you shouldn't have several on hand. This very basic plunger is what most people think of when talking about plungers.

A standard plunger has a rubber cup at the end of a straight handle, usually made of wood. Sometimes the handle of the cup is a different size, but the basic structure stays the same.

Standard Bathtub Drain Dimensions

This is considered a sink plunger because it really only works well on a flat surface, like a sink, where the cup can lay flat over the drain and create the vacuum necessary to properly plunge and dislodge the sink clog. It's much better to have a plunger designed for toilets. A toilet plunger has a cup, like that of the sink plunger, but it also has a soft rubber flap that folds out from inside the cup.

The fold-out flap fits quite well into the toilet drain opening, making it easy to form the necessary suction to clear a toilet clog. With the flap folded inside the cup, this plunger can also be used on a sink or tub drain to create a seal. A toilet plunger is perhaps the best option for all-around home use because the fold-out flap provides flexibility to allow it to fit just about any drain. This interesting looking plunger has a design even better suited for clearing toilet clogs because it has a smaller cup.

It is not very well suited for use on other drains. It can produce quite a bit of force but it is not very easy to use. The plastic that it is made of is quite hard, so creating a vacuum seal over the drain is a challenge. This is a powerful but not very versatile plunger. A taze plunger is used for clearing large pipes and not the typical household drain clog. A taze plunger consists of a disc sized to fit a particular pipe size, and a long steel rod that pushes the disc into the pipe.

This is a specialty tool normally owned only by professionals. Toilet Plunger. Accordion Plunger.

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Taze Plunger. Read More.


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