Bathroom Sink Drain Sizes
What’s important to understand is that the drain of the sink has to be equal in size or smaller than the drain hole. A drain hole of 1 1/4 inches needs to have a drain that size or smaller. A drain hole of 1 1/2 inches can use a drain that is 1 1/2 inches or 1 1/4 inches.
What is the standard drain size for a kitchen sink?
All kitchen sinks today have the same diameter drain, which is 3 1/2 inches and is larger than a bathroom drain which measures in at 1 1/4 inches. It is the same size as a typical standard shower drain, however. When installing a new drain into the sink, you have no need to shop for certain diameter drains.
Are all kitchen sink drain holes the same size?
All kitchen sinks have the same diameter drain, which is 3 1/2 inches and larger than a bathroom drain which is 1 1/2 inches. The same size as a standard shower drain is what it is.
How do you measure a drain?
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.
What size should drain pipes be?
Toilet drain pipes are usually 3 inches in diameter. Washing machines and laundry sinks generally need 2-inch drain pipes. Shower and bathtub drain pipes are usually 2 inches in diameter. Sinks usually require a 1.5-inch drain pipe.
What is code for kitchen sink drain?
It must be level or water could drain out of it. This means the inlet must be vertical and the trap arm outlet must be horizontal but with a minimum slope toward the drain of 1/4 inch per foot and a maximum slope that is no more than the pipe diameter.
What size is main drain line?
A 3-inch pipe is what’s used in homes to pipe toilets. The 4-inch pipe is used as the building drain under floors or in crawlspaces to transport all the wastewater from a home out to the septic tank or sewer. The 4-inch pipe may also be used in a home if it’s capturing two or more bathrooms.
How is drain hole size measured?
Kitchen Drain Sizes
According to Signature Hardware, a standard kitchen drain is 3 1/2 inches in diameter. This is the measurement across the center of the drain, from one side to another. The drain strainer, the bowl-shaped piece inside the drain mouth, matches this dimension.
What is the size of smaller drain pipe for kitchen sink?
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.
