Sink Drain Pipe Size Code

To be safe install more supports than are required.

Sink drain pipe size code.

This pipe size is commonly used for sanitary drainage. Compare the fixture to the minimum sizes of drainage pipe by fixture table. The last size is 4 inch drain pipe that can be connected to 160 units in horizontal stack and 240 units in vertical stack. Bathroom vanity with cooper sink.

You ll see these distances also in our sketch at left. A single trap can service more than one sink but adjacent drains cannot be farther apart than 30 inches. Horizontal drain pipes connecting the sink drains to the trap must have a minimum slope of 1 4 inch per foot toward the trap. 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.

Tables of plumbing drain pipe vent pipe sizes critical distances to plumbing fixtures. For instance the minimum pipe diameter for a washing machine drain is pipe with a 1 1 2 inch diameter. According to most codes copper supply pipe must be supported every 6 feet galvanized or black steel pipe every 12 feet pvc or abs drainpipe every 4 feet and cast iron pipe every 5 feet. The horizontal pipes connect to the trap with a double wye tee which has two y shaped inlets and one outlet.