My kitchen sink drain runs from one side of the house to the other where it connects to the base of the stack vent. The total distance is about thirty feet.
I have two questions:
1. Is the current 1.5" pvc pipe large enough or should I replace it with a two inch pipe? It drains a double sink with garbage disposal.
2. The only vent it has is basically a loose drain connection from a washing machine that was once installed (rigged) in the kitchen for the previous owners, if you want to call that a vent.
I'm going to replace the pipe. Over that 30 feet, does it matter where I tie in a vent assuming it needs a vent. I want to vent it as close to the stack as possible.
Hope that makes sense.