Fidodie
New Member
This just occured to me - i'm planning on adding a bath group, and will have a vertical 3" pvc into a 4x4x3 combo on its back joining 4" cast - i was going to go with two hubless/banded couplings to splice this into the horizontal run.
perhaps relevant info:
there is a 2nd story bath (on main stack), kitchen, and sewer ejector (serving 1.5 baths, and kitchenett) upstream, and one 2nd story bath downstream of the intended splice. 1 revent and one secondary vent upstream from the main stack too. I need to do some work on the mainstack, since i'm removing a w.c.&lav which was wet vented so i'll have cut into it anyway. adding washer there, properly vented.
The real questions:
thanks - as always!
perhaps relevant info:
there is a 2nd story bath (on main stack), kitchen, and sewer ejector (serving 1.5 baths, and kitchenett) upstream, and one 2nd story bath downstream of the intended splice. 1 revent and one secondary vent upstream from the main stack too. I need to do some work on the mainstack, since i'm removing a w.c.&lav which was wet vented so i'll have cut into it anyway. adding washer there, properly vented.
The real questions:
- Am i asking for trouble splicing a two foot pvc run into cast?
- Should i change the 20' or so of upstream 4" cast to PVC, and just have one coupling for the PVC to cast transition?
thanks - as always!