Double Vanity Drain Pipe Size

Therefore a 1 1 2 inch drain will accommodate a double bathroom sink vanity.

Double vanity drain pipe size.

The current drain line in the crawl space is 1 1 2. This diagram of a typical dwv system is called a plumbing tree. Also notice the drain is centered right in the middle of this 30 inch vanity. The last size is 4 inch drain pipe that can be connected to 160 units in horizontal stack and 240 units in vertical stack.

Make sure you follow p3005 1 drainage fittings and connections and the reference table p3005 1 which specifies the proper pipe connections fittings to use to connect it all together. A double vanity can offer a his and hers sink. I am replacing a single sink vanity with a double sink. As with the term on center which is used for construction the term centerline is an imaginary vertical line drawn through a key reference point usually the drain pipe.

Tables of plumbing drain pipe vent pipe sizes critical distances to plumbing fixtures. You probably haven t spent much time observing the pipes beneath your vanity but take a look and this is what you ll see. This line empties into a 3 line after about 10 feet and has a drop of over 6. Minimum drain line size for a double bathroom sink vanity.

Bathroom vanity with cooper sink. This pipe size is commonly used for sanitary drainage. For example if two pipes are specified to be 10 inches apart you measure 10 inches between the centers of the pipes not 10 inches between the edges of the pipes. Water runs down the sink drain into a p trap so called because it s shaped like the letter which fills up with water to prevent sewer gases and odors.

Some older sinks may have drains that connect to a 1 1 4 inch tailpiece but most modern drains have a 1 1 2 inch outlet. This is the minimum size to use for building sewer or drain pipe that is connected to the toilet. The bathroom sink s water lines are roughed in 3 inches above the drain. You ll see these distances also in our sketch at left.

I would like to use all 1 1 2 lines in the wall and connect to the 1 1 2 line to drain for both sinks. A single bathroom sink lavatory drain is 1 drain fixture unit. Below our tables 1 and 2 summarize common plumbing code specifications for fixture venting and vent pipe sizes and distances that a plumbing fixture can be located horizontally from the vent stack. Measure 21 inches approximately above the finished floor.