had a flood problem (natural - rain and runoff from the mountains, water intrusion) into the pool room, flooded the pump. After replacing the pump motor and starting to clean the pool, the pump suddenly does not provide for steady, full flow of water from the pool to the filter, it surges. Any ideas? I've backwashed the filter, opened the filter and the sand appears to be OK.
You don't really say how bad the flood was, but you do imply that a lot of sediment entered the pool. If that's the case, you could very well be clogging up the return lines by your vacuuming. Heavy silt won't move completely out of the lines easily or ever, sucking it up is a very different thing. Have a professional come out to literally blow the lines clear, commonly done for winterizing.
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