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I am trying to help a friend with her pool. She is loosing pressure after the pump is running a litltle while. I checked the impellar and it is not clogged. There are no visible suction side leaks either. She did a baqua conversion this year but did not change the sand could this cause the rise in pressure? Her pressure gauge stays around 18 to 20psi.
The Baquacil remnants can cause the sand to clog quickly.
Air bubbles are coming out the jet after I backwash and rinse. When it is first turned back to filter bubbles come out the jet for a second then it stops.
Something else when I put the valve on by pass to pool the pressure runs 15psi and the flow from jet is strong. When I turn it back to filter the pressure decreases does this mean the sand is clogged or a suction leask or maybe both.
As JohnT said you need to change the sand after a goo conversion. Momentary bubbles out the jet, I wouldn't be concerned. If they are sustained then there is a reason.
Just a side note...you can edit your post up to some time limit after the original posting but I'm not sure what that time limit is yet.
Al