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mrchuckles

Water flowing out of the overflow drain during backwash

mrchuckles
9 years ago

I have a sand filter with a backwash. It used to work fine. Recently, it has begun flowing water out of the overflow drain when I attempt to backwash the pool. Needless to say, the water is dirty and should not be flowing in that direction. The same thing happens when I try to drain the pool or switch the multi-select valve to rinse. Does anyone have any idea what could be wrong? I don't know where to begin looking.

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