What size is a bathroom drain?

1.25 inches1.25 inches being a general standard, with widths of 1.5 inches and 1.625 inches also common. The size of the hole helps determine which size drain is needed for that particular sink.

What size is bathroom drain pipe?

The standard size for a bathroom sink drain pipe is 1.25 inches in diameter. However, this is determined based on your state’s housing code, and you may find that they suggest 1.5 inches or 1.65 inches in diameter, and your home has been built with this plumbing standard.

Are bathroom sink drains the same size?

Measure the Sink



Measure that opening to ensure you get the right size drain, or check the manufacturer’s instructions that came with the sink, as they should include the corresponding drain size. Most drain openings are 1 1/4 inches, although 1 1/2 inches and 1 5/8 inches are also common sizes.

What size is a bathroom sink P-trap?

1-1/4 inch

Traps come in 1-1/4 inch (standard bathroom sink) or 1-1/2 inch (standard kitchen sink) inside diameter sizes. Be sure to check so you get the right size replacement at your local store. In this guide we’ll show you how to replace a P-trap in a few easy steps.

What is the standard size drain pipe?

1 1/2 inch

There is a pipe size. Most modern drains have a 1 1/2 inch outlet, but older sinks may have drains that connect to a 1 1/2 inch tailpiece. All the pipes that connect to the tailpiece are either 1 1/2 or 1 1/2 inches in diameter.

What size are bathroom sink drains?

1.25 inches

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While a bathroom sink’s design and overall size may vary from one model to the next, the drain holes are fairly standard, 1.25 inches being a general standard, with widths of 1.5 inches and 1.625 inches also common. The size of the hole helps determine which size drain is needed for that particular sink.

What size is a vanity drain?

The 1½-inch size is used to capture water that might flow out of a kitchen sink, a bathroom vanity or a tub. The two-inch pipe is commonly used to drain a shower stall or washing machine, and it may be used as a vertical stack for a kitchen sink. A three-inch pipe is what’s used in homes to pipe toilets.

What size is a sink drain pipe?

Drain Line Pipes



This pipe is usually 1 1/2 inches in diameter. However, many homes have 2-inch drainage pipes. If this is the case, you need a reducing bushing to connect the pipes together. A 1 1/2 inch to 2 inch reducing bushing is the right choice here.

What size are most sink drains?

Most sources claim that the most common size for the sink drain hole is 1 1/4 inches, although some cite 1 1/2 inches as the standard. These two sizes are the most common, explains Bathroom Vessel Sinks, although you may also see sinks with a 1 5/8-inch drain hole.

How do you measure a bathroom sink drain?

Measure from the wall where the house drain pipe is to the nut securing the J trap to the sink drain pipe with a tape measure. Add two inches to the measurement and write it down on a piece of paper. This is the measurement for the rear sink drain pipe.

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How do you measure the diameter of a sink drain?

How to Measure a Sink Drain Opening for a Crumb Cup

  1. Measure the drain opening across its widest part. This gives you the diameter of the drain circle.
  2. Insert the end of the measuring tape into the drain, beside the edge. …
  3. Note the measurements on a piece of paper and take them with you when you shop for a crumb cup.


How do you measure the size of a drain pipe?

To find it, measure around the circumference of the pipe with flexible measuring tape. Divide the circumference by pi, or about 3.14159. For example, if the circumference is 12.57 inches (319 mm), you would divide by pi, and get an outside diameter of about 4 inches (100 mm).

What size pipe is a shower drain?

2-inch

Keep in mind that shower drain assemblies are generally made to fit a 2-inch drainpipe, not the 1 1/2-inch pipe usually found on tubs. A 2-inch pipe is the recommended size because showers have a low threshold for flooding, and a 2-inch pipe helps the water drain faster than does a 1 1/2-inch pipe.

Can a shower have a 1.5 inch drain?

Current plumbing codes (IPC as well as MA Plumbing Code 248 CMR 10 for instance) need 1.5 inches to drain for a tub with a shower. The tub can drain at leisure and the shower function when in utilize, with flow-limiting showerheads, fall within the flow rate that a 1.5” drain can handle.