Swimming pools blog

THE number one culprit for lost suction is the O-ring on the pump lid. You
should clean and lube it every time you take it off and replace it if it
starts to get hard, flat or crack. Do not use a petroleum based lube. Use
silicone based lube. The reason for the lube and do not plaster it on nor be
really economical with it is to be able to tighten the lid down so the O-ring
is in full contact with the lid and to be able to get the lid off. If this
is a plastic pump and the pump has been run dry the heat generated can
sometimes cause the schedule 40 PVC to shrink. The first sign will be
leaking on the output side where the fitting screws into the pump. What you
do not see is that air has smaller molecules than water and therefore can fit
through a tighter space. The fitting on the nose of the pump has to seal
well if there is any question as to the integrity of the fitting just hack
the PVC back a few inches and glue on another fitting with a small piece of
pipe and a coupler. You did not say if you plug the hose in the skimmer or
have a dedicated line. If you have a dedicated line you may have a Jandy or

Compool valve before the pump. The lid O-ring and the O-rings around the
shaft of the valve can cause the same problems. Question, does the pump
strainer get full when you do not have the vacuum hocked up? By full I mean
water all the way to the top no air.