What is the code for washing machine drain pipe?
Standpipes shall be individually trapped. Standpipes shall extend not less than 18 inches (457 mm) but not greater than 42 inches (1066 mm) above the trap weir. Access shall be provided to standpipes and drains for rodding.
What size PVC is used for washer drain?
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.
Does a washing machine need a 2-inch drain?
Drain and Trap Requirements
A 2-inch drain pipe is required for all washing machines. The former requirement of 1 1/2-inch pipe is not enough to handle the fast drainage of modern washers. As with all plumbing fixtures and appliances, a washing machine drain pipe must also contain a P-trap.