I have a construction thread on here but don't get much traffic and need to know this asap as the plumbers are here. Pool builder says 1 1/2 inch pipe is used at the gunite wall due to fittings and then it is 2inch runs in the trenches. When talking with the pool builder (owner) upon signing contract he said 2 inch minimum which is on our contract. So do the fittings require 1 1/2" ?