jeffvdm
New Member
I have a shower reno in progress and my existing shower drain line is 1.5" abs. The new drain (kerdi) is to be connected to 2". I have access to the p-trap and a couple feet of the drain line following the p-trap. I was curious at what point do I convert the 2" line to connect to my existing 1.5" abs. Before or after the p-trap?