probably a dumb question but...

Ideally it should stay full. The most likely culprit is the gasket at the pump basket lid. My equipment is relatively new and I noticed air coming out of the returns not to long ago. Not a major problem but was something new. Last time I cleaned my filter I payed a little more attention to the gaskets cleaning and lubing them and the problem went away. For gaskets you want to use a lube like Jacks Multilube I use food grade silicone since I have it on hand for beer brewing.
 
I lubed the o-ring last time i took the lid off but i'll open it again and check the o-ring for wear, but i don't think that's it. We had the pump replaced a month ago and that company sucked - could they have done something wrong there? is the pump supposed to be air tight?
 
It should be. Do you see water anywhere around the pad? If this is a new symptom since the pump was replaced probably not the O ring since it is new, my second thought would be the threaded fittings in or out of the pump most likely on the input if you don't see water around the pad. How much air are we talking about just a little every time the pump primes and you are good until the next cycle or are you constantly seeing bubbles from the returns while the pump is running. If it is constant you can try to narrow down the problem area by running water over the fittings one at time as the pump is running if you stop seeing air you found the problem area.
 
there was some water dripping from one of the pipes but i think it had stopped. i'll check it again and the pump fittings. I don't see bubbles in the returns but slowly as the day goes on there is more air in the pump basket and i when i turn the pump off lots of bubbles go back into the pool. by morning (after being off all night) the pump basket is almost empty and i have to bleed the air from the filter every time i turn the pump back on.
 
x,

Sounds like a small air leak to me... The basket should stay full when the pump is off.

Kind of like putting your finger over the end of a straw and pulling water from a glass... When you take your finger off the end of the straw the water runs out. Same thing happens at your equipment pad.

If you have water dripping from the anywhere, with the pump running, that is the first place I'd start.

Thanks for posting,

Jim R.
 
so my air relief valve never really shuts tightly and air continues to come out. this cant be the source as its on the pressure side right?

2 of the plumbing junctions are dripping water too where they bypassed the heater. what is the best way to seal these?
 
Yes, that can let air into the basket when the pump is off.

Are they glued pvc joints? Get some pvc glue in a syringe and squeeze it in where the leak is.
 

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so my air relief valve never really shuts tightly and air continues to come out. this cant be the source as its on the pressure side right?

2 of the plumbing junctions are dripping water too where they bypassed the heater. what is the best way to seal these?

If your pressure relief valve [on your filter] is not 100% tight, then yes, it is higher than you pump basket and the air bleeding out is causing a suction loss of water in the pump basket [while the pump is off]. This is just the opposite when you turn on your pump, it primes and fills up, then you open the pressure relief valve to purge out the air.

You need to make sure everything is air-tight and leak proof as well [your piping]. Sorry to hear you had a bad install. BTW, what type of pump did you have installed?

good luck, tstex
 
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Pump pictures
 
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