What Is The Standard Size Of A Bathroom Sink Drain

The standard size of a bathroom sink drain is 1 1/4 inches (31.75 mm). This is the most common size for bathroom sinks, and it is the size that is typically used for replacement drains. However, there are some older sinks that may have a 1 1/2-inch (38.1 mm) drain. If you are not sure what size drain you have, you can measure the diameter of the drain hole. The diameter of the drain hole should be the same as the diameter of the drain.

In addition to the diameter, you will also need to know the length of the drain. The length of the drain is the distance from the top of the drain to the bottom of the drain. The length of the drain will vary depending on the type of sink you have. For example, a drop-in sink will typically have a shorter drain than an undermount sink.

Once you know the diameter and length of the drain, you can purchase a replacement drain. Replacement drains are available at most hardware stores. When purchasing a replacement drain, be sure to choose one that is made of the same material as the original drain. This will help to prevent corrosion and leaks.

Installing a replacement drain is a relatively easy process. However, if you are not comfortable working with plumbing, you may want to hire a plumber to install the drain for you.

Here are some additional tips for choosing and installing a bathroom sink drain:

When choosing a drain, be sure to consider the finish of the drain. The finish of the drain should match the finish of the sink and the other fixtures in the bathroom.
When installing a drain, be sure to use a plumber's putty to seal the drain around the drain hole. This will help to prevent leaks.
Once the drain is installed, be sure to test it for leaks. To test the drain for leaks, simply fill the sink with water and let the water run for a few minutes. If there are any leaks, tighten the drain until the leaks stop.