What is the minimum and maximum height of a standpipe?
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 is the minimum height of a standpipe?
Also, the 18-inch minimum height of the standpipe intends to prevent the possibility of the clothes washer’s pumped waste from overflowing the standpipe.
How high should washer water hookup be?
Once you’ve selected the right washing machine outlet box for your situation, it should be installed at a height where the flood level rim (or the top of the drainage outlet) is 32” to 34” above the finished floor.