Mtnj31
New Member
Hello guys. I’m working on a bathroom remodel and I could use some advice. We were smelling sewer gas pretty strong and it appeared to be coming from the tub drain. I removed the old tub and saw the old brass drain assembly was cracked just after the connection where it met the cast iron p trap. The trap is cracked at the top and I want to replace it with PVC. I’ve read plenty on which couplings to use but the cast iron p trap OD is 2.5 in. I’m wondering what size coupling I could use to attach the 2.5 in cast to PVC once I remove the cast p trap. And can I attach a 1.5 in PVC trap for the tub drain to this? This size pipe isn’t too common from what I’m reading. Any advice is greatly appreciated.