Sink Drain Pipe Size Code

Tables of plumbing drain pipe vent pipe sizes critical distances to plumbing fixtures.

Sink drain pipe size code.

For instance the minimum pipe diameter for a washing machine drain is pipe with a 1 1 2 inch diameter. 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. Bathroom vanity with cooper sink.

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. 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. The horizontal pipes connect to the trap with a double wye tee which has two y shaped inlets and one outlet.

The last size is 4 inch drain pipe that can be connected to 160 units in horizontal stack and 240 units in vertical stack. 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. This pipe size is commonly used for sanitary drainage. 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.