Converting a tub to a shower, and with the drain location changing I'm just getting back to the underbelly and seeing the alignment of things before hooking it all back up.
You can see the new drain now sits into the room roughly 1.5-2in as compared to the max reach of the new p-trap. I put a piece of 2in into the drain to illustrate the shift. Side note, I do realize I will be transitioning from 2 to 1.5in, which is OK per code and flow rate of the shower head in my area.
I was hoping the extra pipe going to the p-trap was going to be the place to splice in, but now I'm not sure. Should I be rebuilding everything between the lines? Playing around with elbows to get it over to the new drain?
I'm comfortable working with ABS – just want to be sure it's the best approach.
Best Answer
You should cut the 2" main line (at the location shown in the first picture) and rebuild the assembly entirely, eliminating the combi (reducing tee) and any 1 1/2" components and orienting a new 2" sanitary tee to the correct angle to line up with a new 2" trap located directly under the shower drain. Why on earth would you reduce to 1 1/2" here when you could very easily make this all 2"?