I have a kitchen sink/dishwasher. Behind the sink is a washing machine that drains through a water hose. Seriously. If I would like to use the same vent and drain what size pipe is required?
The sink is upsized to 2" and the existing vent is 1.5" of course would have to put a trap etc for the was her but would a 2" drain and a 1.5" vent accommodate a dual basin sink, a dishwasher and a washing machine?