When I backwash my pool, I usually get sand spitting out of the return for the first few seconds that I turn the pump back to filter mode. I've checked all the pipes in the filter and they all seem to be fine, no cracks or anything. So after doing some research, I think that I probably have a pump that is too strong for my pool. I don't know the HP of the pump off hand (I'm at work), but I know that when I bought the pump and filter combo, I accidentally told the pool guy that I needed it for a 27' foot pool instead of a 21' foot pool. Short of buying a new pump, is there anything I can do about this? Would getting smaller lines help anything or would that just make it pump shoot the water out that much harder? I'd rather not buy a new pump because of this, but cleaning up the sand everytime I backwash is becoming kind of a pain.