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Question DetailsAsked on 7/18/2016

husband vacuumed pool, then pump stopped drawing water. Tried to prime it but water goes through and then stops

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1 Answer


OK - if you prime it and it spits out the water forcefully then pump is OK - one of following is likely cause of problem:

1) clog in the suction line leading to the pump - either in the main suction line at a location AFTER suction pipe (because if blocked in only one of those two would still get water), or if you have a trash/leaf basket on the inlet side of the pump (should have but not all do) tht could be full.

2) vacuum line left attached and out of water, the suction line connection port cap was not put back on or the gasket is bad, or the skimmer or bottom cleaning bot or such connected to suction line port is cracked or disconnected or is out of water so it is pulling air.

3) water level in pool is low, so the gutter does not have water, meaning the suction line leading from the leaf strainer in the gutter is pulling air. One of two (or more) suction lines being blocked will not stop the water flow (may reduce it some though), but any suction line port or line being open to the air will break the suction being pulled by the pump and pull air through - usually greatly reducing or totally eliminating water flow. This is especially true with above-ground pumps, sitting above pool water level.

4) many systems have a suction cleaning valve which you move to use the vacuum or pool cleaning bot - so all the pump suction is through only that suction line. Could be after cleaning he disconnected the suction hose and closed the port (so line cannot pull air) but forgot to turn the cleaning directional flow valve back to turn off the cleaning suction line and reopen the pool suction lines.

If you have a pressure-side hose connection or bleed valve (on the outbound side of the pump) if you open that up, if no or basically no water or air comes out, almsot certainly blocked line. If air comes out (not necessarily at high pressure but a noticeable flow) probably means pump is sucking air.

If these ideas do not tie the cause down for you, the Pool and Spa is the Search the List category to find a repair vendor if you do not have a regular pool guy.

Answered 3 years ago by LCD

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