I'm using 3/4" cpvc 4 everything.Home Deport is full of s*%t. They never have what you need at no time.So i got what was available at the time.Plus my anxiety and patience wouldn't let me wait any longer.LOL Any way i decided to put this contraption on my 75 gal instead.And i purchased a ballvalue to place om my return pipe. It's working a lil better now. But i've come to realize that my pump is tooo strong for what i have right now because the pump is making i desperate sucking noise in sump like a thirsty pig. lol