I really need someone to point me in the right direction as to what I should insist on in my new pool. I think the pool builder I have decided on emphasizes quality - he uses all Pentair equipment - but I was wondering what I should insist on for the number of returns, drains, pipe sizes etc. In his proposal he specs that all plumbing shall be 2 inches or greater. I plan on requesting that all elbows be sweep elbows. He specs 5500 psi shotcrete with number 3 rebar 12 inches on center. how thick should the walls and sides be? is there anything I should request in regards to the plumbing? Number of valves, location of valves? my pool is also going to include a 7 X 7 spa as well as automation and a waterfall feature. How should all this tie into automation. Any advice will be greatly appreciated.