Many pool owners use this term when in fact they really mean they have lots of pressure but their flow is very low. This is caused by a dirty or clogged filter, a blocked return line, or a valve that is shut off or partially shut on the return piping.

The pump’s impeller may be clogged with debris. Check by first shutting off the pump. Remove the basket and check the impeller by putting your finger into the suction hole found in the pump strainer housing. If the seal is broken, replace it. For seal change instructions on Hayward pumps, refer to your Owner’s Manual that is supplied with your pump (also available online under the product page for your pump), or contact your local pool dealer.

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