Bathroom Sink Hole Size
A key part of a home building or remodeling job is determining the bathroom plumbing rough-in dimensions for installing the water supply and drain lines. The plumbing rough-in ensures that the toilets, sinks and other bathroom fixtures will be properly aligned. Learn the standard sink faucet hole sizes (1 3/8-1 1/2 inches) and how to measure, choose, and install the perfect faucet for your kitchen or bathroom sink.
The faucet hole in a bathroom or kitchen sink is what enables the faucet to be installed, so it's important that the faucet you choose is compatible with the size of the hole in your sink. Most types of sinks will have a standard-size faucet hole so that it can be used in conjunction with faucets from different manufacturers; however, there are some size discrepancies depending on who you. Understand standard faucet hole size for kitchen and bathroom sinks.
Get expert tips on compatibility, installation, and choosing the best faucet for your sink. The standard faucet hole size for both kitchen and bathroom faucets is 1.375 inches in diameter. However, this can vary slightly from model to model.
If a faucet is bigger than the standard hole size, this will generally be advertised alongside the product. You may have multiple faucet holes to fill, depending on what sink you choose. Discover 2026 bath sink sizes and standard bathroom sink dimensions.
Learn how to measure, pick the right sink size, and fit it perfectly on your vanity. Why Drain Hole Size Varies (Vessel Sinks and Other Exceptions) While the 1-5/8 inch to 1-3/4 inch range covers most standard drop-in or under-mount bathroom sinks, certain design types feature a different drain hole size. Vessel sinks, which sit entirely or partially above the countertop, are the most frequent exception.
The standard hole size for bathroom sink faucets is typically 1 3/8 inches in diameter, but it's essential to measure the existing hole or check the specifications of your sink before choosing the best faucet for your sink. Standard oval and round bathroom sinks have a diameter of 16 to 20 inches and an average water depth of 5 to 8 inches. Faucets and sinks come in many configurations, but if your faucet doesn't match there are usually ways to make it fit.
A three-hole sink is a common bathroom faucet hole size and is also a common type of kitchen sink. Faucets used on a three-hole sink usually have a plate or a base, called an escutcheon, which covers the holes. Unless otherwise noted on the Specification Sheet for a single-control bathroom faucet, the hole size of the sink should be 1-3/8" in size.