Pump surging after replacing filter

Posted: Sun Oct 22, 2006 10:44 pm   Post subject: Pump surging after replacing filter.

After I change my filter, the pump surges. It continues to run, but builds up a surge with a cycle time of 1 min. or so.

Does this mean I have a vacuum leak? Could this be as simple as not getting a good seal when I closed the filter?

Will this harm the motor and pump?

Yes it will damage the pump. And yes you probably have an air pocket in the wet end that will not release. To do so turn on the jets, then loosen ( but do not undo all the way) the 1-1/2" or 2" nut on the front of the motor. Water and air will leak out. After the air is gone the pump will stop surging. Once this happens hand tighten the nut. If it drips use a pair of channel locks and gently tighten until the drip stops. If you over tighten you will crack the nut. On top of your filter lid do you have an air bleed valve? If so when you change the filter before you pull the lid off you should turn the power off, loosen the bleed valve, replace the filter, turn the power back on, when water starts to come out of the bleed valve tighten until it stops dripping. This will help stop the air lock problem. Sometimes an air lock will work itself out after a day or so. But by then the motor may be damaged beyond hope.