Quote Originally Posted by dep78737
What are you trying to do? Maybe we can help beyond what was said above if we know the purpose.
I am trying to figure out how I will backwash and drain if I buy a new filter (don't even ask me about the ancient DE filter that I "inherited" with this house and pool). I am thinking of a Hayward top-mount sand filter, or a cartridge model. There is no septic drain anywhere near the pump and filter, so I will have to use a hose somehow to backwash. I could not find any PVC parts at Lowe's or Home Depot that would adapt 1 1/2" down to 3/4" (which is the size of my garden hose, I believe).

Thanks for whatever advice that you can give.