Doing a complete remodel of a 55 year old shower and bathroom and may have a drain issue. A bit of history. Its a non-standard shower stall size and the drain was in the front corner. I've busted out concrete to re-locate and center the drain. The hole is open from the new drain position to the old cast iron T. I've built the new 2" ABS P-trap, drain pipe and ABS to CI adapter. I just did a GPM test to make sure it worked. I can get 3/4 gallon in 15 seconds then the last 1/4 gallon takes another 15 seconds to get through! When I had the T open (see pic #3) it looked clear. The original cast iron P-trap and drain pipe were 1 1/2" and I don't ever remember it being slow or backing up in the 30 years I've lived here.
Ive got well over a 1/4" per foot slope on the drain pipe. The adapter at the cast iron T is a threaded 1 1/2" adapter, then a 1 1/2" to 2" Fernco. The extra clamp at the cast iron T is just added leak protection. Its a cutoff of a 1 1/2 Fernco over the leftover threads.
Is there something wrong with my build or is it likely just old slow cast iron draining?
Dev
Ive got well over a 1/4" per foot slope on the drain pipe. The adapter at the cast iron T is a threaded 1 1/2" adapter, then a 1 1/2" to 2" Fernco. The extra clamp at the cast iron T is just added leak protection. Its a cutoff of a 1 1/2 Fernco over the leftover threads.
Is there something wrong with my build or is it likely just old slow cast iron draining?
Dev