For a brass tub drain and overflow, how would one connect the brass tailpiece to transition to an ABS p-trap?
The issue is that the brass pipes seem to have a different outer diameter compared to ABS pipes of with the same nominal size. My concern is that a trap adapter with a slip joint intended for ABS pipe diameters may not seal properly on the brass tailpiece. There are also trap adapters for copper pipes, but so I have not found an adapter stated for brass.
For illustration, a brass tub drain tailpiece like this:
Most trap adapters seem intended for ABS on both ends, such as this ABS DWV 1-1/2 Trap Adapter Hub x SJ:
Though some are intended for copper, like this ABS-Copper Adapter 11/2 HxSJ:
Would the latter ABS-Copper adapter work on a brass tailpiece? Or is a different adapter needed?
Best Answer
Don't use a slip joint inside the floor. Use a fernco without a trap adapter.
I think but not sure if this was outside the wall, eg a bathroom sink, you would use a rubber slip joint washer instead of nylon to solve this. And if that didn't work .. a fernco.