I'm attempting to convert my above ground pool plumbing to hard PVC. I'm having trouble trying to find unions that fit the outer thread on the pump, sand filter, strainer and return. Does anyone have an idea what type of unions (bushings) I can use?
Also, I've seen several folks use ball valves on the skimmer and return lines. Is there any benefit from these? When would you actually close them? Surely you wouldn't when you close the pool because you'd have water in the pipes.