The motor in my pump (paired with a DE filter) died the other day. I have another pump (that's paired with a Sand Filter) I inherited when my brother in law dismantled his pool. I'm not sure if it still works, but I'd like to test it out before I buy sand and fill the filter up. Is there a good method for testing a pump to see if it works? Is there harm in just hooking the whole thing up to the skimmer and letting it backwash out of the filter and not send it into the return? I know I could probably just buy a new pump, but if I don't have to I really don't want to (not at this time at least).
I have a 20' above ground round.
Thanks for all your help.