Question about Pentair 3hp Whisperflo Pool Pump In - Ground

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Pentair pool pump strainer basket has a lot of air bubbles never seem to fill up .

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Either you have a suction side air leak or the pump is too large for the plumbing and is cavitating.

Posted on Jul 11, 2010

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Why is the pump pulling water but blowing air as well as water in the pool?


look for small crack in strainer housing or missing o-ring on cover , i use a eye dropper of blue dye on outside !! of strainer housing , a quick look at pool return and you'll see where the crack is , dry out housing 1st but superglue has saved many a cracked strainer from replacemnet

May 08, 2014 | Pentair "Pentair" In Ground Pool Pump ...

1 Answer

My pump is running but pulling no water from the pool. It ran ok for 1/2 a day but a lot of air bubbles into the pool. Now it will not pull water again.


First of do not let the pump continue to run with out pumping water, permanent damage may result.
A couple of thing could be your problem. 1-Make sure the basket in your strainer is not plugged up preventing water from freely flowing through it.
2-Most likely you are sucking air in from the lid on the pump where the strainer is, you may need to replace the o-ring(s) and be sure to get the waterproof grease from the pool store and lubricate the o-ring(s) liberally and try it again.
Good Luck

Jun 16, 2011 | Plumbing

2 Answers

Not pumping strong. Filter pressure gauge is going low.


Could be air entering the pump on the suction side - dead giveaway is a stream of bubbles entering the pool, possible causes are damage/faulty pipe joint, leak at strainer basket - is the o-ring clean and in place, is the lid craked? Other possibility is leaves etc caught in the impeller caused by damaged or missing strainer basket.

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1 Answer

I came back from vacation to find the pool not running. Power must have triped while gone. Turned power back on at the breaker. Went to the autopilot to turn system on. Autopilot was fine and had power but...


It sounds like your pool pump might have lost its prime. Make sure the lid is on and is secured tightly. Check your water level to make sure that it is above the skimmers. Make sure the suction lines, pump strainer, and pump pot are full of water. After you check these things, re-prime. If this still doesn't solve the problem, also check for clogged baskets and worn out gasket/valve. Make sure that you don't have an visible air leaking in the pool (look for bubbles).

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1 Answer

Losing pressure after about 15 mins pool pump stars really well but then seems to lose pressureleaf catcher before pemp seems to get air in it is this pump or pipes


If the inlet strainer gets air in it, the pump will lose prime. Fill the inlet strainer basket with water, make sure the cover is on air tight. Start the pump and watch the inlet strainer, the amount of air trapped should not increase, if it does, you have a leak somewhere on the piping between the pool and the pump.

Nov 19, 2010 | Plumbing

1 Answer

I have a Whiperflo 3hp pool pump. The water


There are a couple things that you will need to check when pool pumps start losing pressure. Air bubbles are definitely one step, but check these things as well. Check you impeller to see if there is a clog or obstruction. You pump strainer could also be clogged. It could be that your o-ring needs to be replaced also. Try these things, reprime the pump, and see if it maintains pressure.

Jul 19, 2010 | Pentair 3hp Whisperflo Pool Pump In -...

1 Answer

We do not know where the air filter valves are


Air filter?

Remove the strainer basket cover ... fill with water ... check the gasket ... replace if questionable ... close the cover and SNUG the top down. Start the pump ... it should run just fine.

If you are sucking air, tighten the strainer basket cover a little.

Still sucking air? You will have to find the air leak. You might plug the leak with plumbers putty.

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1 Answer

I have a Shasta pool from 1996. I replaced the


either you have an air leak somewhere on the suction side or your impeller is very clogged. you can fill the pump with water and turn it on, it should try to pick up prime, right when it starts to pull in some water turn it off and try to listen for air leaks or water squirting out somewhere on the suction side. Also, remove the pump basket and try to feel the impeller to see it there is any debris in it. the main cause for a clogged impeller is a cracked or broken pump basket. Also, if the pump has run dry for any period of time, the threaded fitting on the suction side of the pump can shrink and cause a large enough air leak to keep the pump from priming.

Nov 14, 2009 | Pentair 3hp Whisperflo Pool Pump In -...

1 Answer

I have Hayward earth filter for the pool along with a Pentair Mini Max 100 pool heater - first time starting both for the season and the filter motor is making a straining noise. For the few minutes its...


make sure all vents are clean check to see if there is anything stuck in impeller with pump off take straner basket out look at opening going back to filter is water filling the strainer basket

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1 Answer

In-g pool loss of pressure and bubbles from return line any ideas


If you notice bubbles in the water returning into the pool from the eyeball/discharge, or water in the strainer basket is visibly swirling (bubbles visible) odds are you need you replace the o-ring on the lid of the strainer basket in the front of the pump. This basket may also be clogged with debris, which also effect pressure. Could also be a cracked or warped strainer lid. Should be easy to see when you remove to check o-ring. Once you remove the strainer o-ring make sure you lube it with a good silcone based lube.

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