Are all kitchen sink drain holes the same size?

Author: Carlos Hessel  |  Last update: Thursday, September 4, 2025

Whether you have a single or double basin sink, the standard, universal drain hole diameter is 3-½”, this size ensures compatibility with other drain assemblies or garbage disposals.

Do all kitchen sinks have the same size drain hole?

The standard size for the hole is 35mm.

Are kitchen sink holes standard size?

The standard size hole for a kitchen faucet is typically 1 3/8 inches (35 mm) in diameter, as per industry norms . This size is commonly used for the mounting hole in most kitchen sinks. It's important to note that this is a general standard, but variations may exist.

Are kitchen sink drain sizes universal?

The most common drain pipe sizes are 1 ¼ inches, 1 ½ inches, and 2 inches in diameter. The size and type of sink will affect how big your drain pipe should be. Improperly sized drain pipes can cause plumbing problems.

Are sink drain holes standard size?

There are three common drain sizes for bathroom sinks, 1.25", 1.5" and 1 5/8 (1.625"). You need to select a drain that is the same size or SMALLER than the hole in your sink. For example, if you have a sink with a drain hole of 1.75", than any of the drains 1.25", 1.5", or 1.65" will work.

Throw it in the sink and the drain will never clog again! 💥(Amazing)🤯

How do you measure a kitchen sink drain hole?

Remember, for any product that goes in a drain, you will first need to remove the drain cover/grate before measuring. Then measure the diameter at the top of the drain hole. When in doubt, round up to the nearest size.

Are all sink holes the same size?

Factors Influencing Faucet Hole Sizes

Most sinks are 6 to 12 inches deep, with 8, 9, or 10 inches being common. Deeper sinks might need bigger holes for the faucet to reach. Faucet base plate size: The size of the faucet's base plate also matters. Larger plates might need bigger holes for a good fit and look.

Are all sink openings the same size?

Measure the Sink Opening

Common Sizes: Most sink drain openings are 1 1/4 inches in diameter, but you might also find sizes like 1 1/2 inches and 1 5/8 inches.

How do I know what sink drain to buy?

Determining Your Sink Drain Size

The size of the drain is typically determined by the diameter of the drain opening in the sink and the corresponding plumbing fittings. 1-1/4 inch drains fit the standard 1-5/8 inch drain opening.

Are kitchen sink holes universal?

Due to so many different styles, kitchen faucets are not universal. The base plate is often the differentiating factor with some the mounting holes are the standard 1 3/8” but there are also faucets on the market that have a 1 or 1 1/2” mounting hole.

Are sink waste holes a standard size?

the simple answer is that basin wastes are 1¼” BSP (32mm), whereas bath and kitchen sink wastes are 1½” BSP (40mm).

What is the average size of a sink hole?

From review of this information an average sinkhole size of about 3.4 meters (11.2 feet) has been found. The information is valuable in planning sinkhole investigations because it provides an approximate measure of the size of the zone that can be affected by a sinkhole.

How do I know what size kitchen sink strainer I need?

Your choice of sink strainer relies heavily on your sink's drain opening and depth. The most commonly used strainers have a diameter between 3½ inches and 4½ inches. Make sure to size the strainer appropriately to prevent leaks and malfunction. Most sink depths range between ⅛ inch to ⅜ inches.

Should a kitchen drain be 2 inches?

2 inches – A pipe of this size in diameter will allow for an even heavier capacity of water flow, making it ideal for sinks within homes that are a good distance away from the main sewer. A two-inch pipe will also be ideal for faucet units with the capacity for high volumes of water.

How to measure sink drain plug size?

To determine the right size of plug, you need to measure the diameter of the drain mesh or the underside of your current plug. Then you'll be able to shop for the style of sink plug you want and be able to choose the right size the first time.

Are kitchen sink drain holes a standard size?

Kitchen Sink Drain Sizes

Whether you have a single or double basin sink, the standard, universal drain hole diameter is 3-½”, this size ensures compatibility with other drain assemblies or garbage disposals.

Are kitchen sink drains universal?

Kitchen sinks drains do share a universal diameter of 3-1/2", regardless of the sink type. The proper kitchen drain, however, will depend on the material of your sink and whether it has a garbage disposal or not.

Are sink drain sizes universal?

You need to select a drain that is the SAME SIZE or SMALLER than the hole in your sink. For example, if you have a sink with a drain hole of 1.75", than any of the drains 1.25", 1.5", or 1.65" will work. However, if you had a sink with a 1.25" hole, then only the 1.25" drain will work, the bigger drains will not fit.

How do you know what size drain you need?

The overall size of a building is a primary determinant in deciding the appropriate drain pipe size. Larger structures typically require larger and more extensive drainage systems to handle the increased volume of wastewater.

What is the size of a standard kitchen sink?

Standard kitchen sink dimensions are 22 inches long by 30 inches wide, with an average depth of 7 to 10 inches.

How do you measure a sink drain hole?

How to Measure the Bathroom Sink Drain. Drains are measured at the threaded portion of the drain. (This is the section that will go through the sink and countertop.) A standard bathroom sink hole is 1-½” in diameter and will accommodate most lavatory drains.

Are kitchen sink faucet holes universal?

No, there is a variety of kitchen faucet styles and fittings, and the right style will depend on your home's design.

Are kitchen sink plugs universal?

While there are standard sizes for sink plugs, it's essential to measure your sink accurately to choose the right size. Whether you have a kitchen sink or a bathroom vanity, understanding sink plug sizes can save you from common issues like leaks.

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