Sink Drain Pipe Size Code

A single trap can service more than one sink but adjacent drains cannot be farther apart than 30 inches.

Sink drain pipe size code.

This pipe size is commonly used for sanitary drainage. This is the minimum size to use for building sewer or drain pipe that is connected to the toilet. All the pipes that connect to the tailpiece including the p trap assembly. 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.

You ll see these distances also in our sketch at left. Compare the fixture to the minimum sizes of drainage pipe by fixture table. The horizontal pipes connect to the trap with a double wye tee which has two y shaped inlets and one outlet. For instance the minimum pipe diameter for a washing machine drain is pipe with a 1 1 2 inch diameter.

Tables of plumbing drain pipe vent pipe sizes critical distances to plumbing fixtures. Bathroom vanity with cooper sink. 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. Horizontal drain pipes connecting the sink drains to the trap must have a minimum slope of 1 4 inch per foot toward the trap.