Do you need a vent on a washing machine drain?
All plumbing fixtures—including washing machines—must be vented. Improperly vented drains can be sluggish and noisy, and can emit hazardous fumes. ...
All plumbing fixtures—including washing machines—must be vented. Improperly vented drains can be sluggish and noisy, and can emit hazardous fumes. ...
According to the Universal Plumbing Code, the standard for washing machine drain size is 2 inches. The P-trap should be ...