The measurement for the diameter of a bathtub drain is 1 and a half inches. The diameter is the measurement taken from one side to the other, cutting directly through the center point. This is helpful for builders and plumbers because when installing a new bathtub, they will know to use rough-in piping that has a diameter of 1.5 inches. The standard bathtub drain size is typically 1.5 inches in diameter. However, it's important to note that this size can vary depending on the type of tub and the specific requirements of your bathroom.
Determine your size for bathtub
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! How & What to Measure Access: A freestanding tub makes measuring easy, since everything is exposed. Built-in tubs can present a bit of a challenge, however. When installing the tub drain rough in, there are some key measurements that are important to get right: Size of the Drain Hole The hole cut into the subfloor should be 5 1⁄2 to 6 inches in diameter. Leave a 1/8 to 1⁄4 inch gap between the drain pipe collar and the hole. Adapt hole size if needed to fit drain assembly. Height of the Drain Step 1: Measure Drain Hole Diameter 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. Step 2: Remove Plumbing Access Panel Remove the plumbing access panel located on the back of the wall that holds the faucet fixtures. Drain body diameter (pipe): 1 1/4" - 1 1/2" Total drain assembly height: 4" - 14" According to the International Plumbing Code (IPC), 1 1/2" is the standard drain diameter size for residential bathtub fixtures. This size is suitable for most modern tubs from major manufacturers like Kohler, American Standard, and Delta.
7 Bathtub Plumbing Installation Drain Diagrams
Step 1: With a tape measure, measure the drain hole in the tub. This would be the width of the drain pipe. Remember to write the measurements down as you measure bathtub drain size. Step 2: Next, you have to detach the plumbing access panel. You can find this behind the wall where the faucet fixtures are. Discharge/drain hole (vertical): 16-20 inches from floor Fixture (side to side buffer): 15 inches minimum from centerline, 20 inches recommended Fixture (front buffer): 21 inches minimum to nearest obstruction, 30 inches recommended. Detailed guide to installing a new bathtub drain. Includes tools needed, how to measure drain, thread types, and testing.Chapters00:00 intro00:12 tools neede. Measuring the Tub Drain. Once you reach the overflow plumbing, you'll need to measure from the center of the overflow straight up to the point where the drain is mounted on the tub. Based on what's more suitable, start by measuring from outside the tub to its underside. Similarly, you can calculate from inside the tub to the floor as well.
7 Bathtub Plumbing Installation Drain Diagrams
With a bathtub, the drain will be 1.5 inches in diameter. The drains for sinks can vary slightly, but the most common measurement for those is 1.25 inches. You might also find sinks with a drain diameter of 1.625 inches. Thanks to the standardization, any bathtub drain can fit any standard bathtub between 14 and 26 inches in depth. There are generally accepted plumbing rough-in measurements for sinks, toilets, and bathtubs or showers. In addition, fixture manufacturers typically provide rough-in specifications in their product literature. So, no guesswork or improvisation is needed. Simply follow the rough-in specs for perfect bathroom plumbing.
Home and Garden | Home Improvement | DIY Standard Bathtub Drain Dimensions By SF Gate Contributor Updated July 21, 2021 7:15 p.m. There is only one standard size for bathtub drains in the United States. Getty Bathroom options are limitless when it comes to styles of bathtubs, sinks, tile and faucets. Besides the bathtub sizes, you should understand the standard bathtub drain size, which is typically around one and a half inches in diameter for a smooth bathtub and plumbing setup. Alcove Bathtub Standard alcove bathtub dimensions: 60 inches x 32 inches x 18 inches
7 Bathtub Plumbing Installation Drain Diagrams
The bathtub's drainage assembly consists of two lengths of 1 1/2-inch pipe, one extending from the tub drain and the other from the overflow drain to a 1 1/2-inch sanitary tee that connects downstream to the P-trap. The fittings for the tub drain stopper and overflow drain, each with its own gasket, are usually supplied with a new bathtub, but. Generally, the typical shower drain diameter size is 1 1/2 inches, though some plumbing codes require 2 inch drains. If you have a large home, multiple bathrooms, and long-running pipes, you will likely need to opt for the 2 inch drain. But if you have a single shower and shorter running pipes, it may be ideal to stick with the 1 1/2 inch drain.
