Question about Pentair 1.0 Hp Whisperflo Pump

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I can run my pump on skimmer or main, but not both at same time without pump heating up and shutting down.

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I am assuming you have a three way valve in front of your pump that allows you to switch between main drain and skimmer. If so take the three way valve apart and check for any obstructions. Also the handle on the three ways are made to fit on the valve only one way. I have seen where the handle was put on the wrong way with some force. If the handle is on the wrong way and you open up the valve so you are drawing from both skimmer and main drain it is actually blocking off the port to the pump which would cause the pump to run dry and heat up.

Posted on Jan 16, 2010

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Posted on Jan 02, 2017

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I'm trying to drain a pool that's Ben sitting for years full of nasty water. Pump works and operates but the fill pot on the pump itself will not stay full


Sounds like you're trying to pull water from skimmer and main drain. Soon as the level goes down, it sucks air from skimmer. Turn off skimmer line. If that's not possible, then cut off input side of pump(front pipe) and run new line to pool. Just lay it on top of ground and keep it below top by a couple of feet. This will stop all the **** on the bottom from plugging up the pump.

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We are in Melbourne and our 3yo pump is playing up. It is pulsating, starting and stopping all the time.


Check the weir door in the skimmer. If it gets something in it to stick it in the up position you will get water trying to run into the skimmer but with the door stuck shut the water get's pulled out by the pump and can't refill the skimmer fast enough. So the pump runs out of water then the skimmer refills. The pump will catch prime and run the cycle again and again. Free up the skimmer weir door and this will fix this. Also low water will do the same thing, so be sure you have enough water in the pool.

Oct 29, 2010 | Aqua Flo Aquaflo Flo - Master Fmhp 1 1/2...

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My pool pump will run fine once I prime the system from the top of the pump basket. Then once the timer shuts the pump off, when it trips the switch to run again there is no water in the pump and it cannot...


If you are a long way above the surface of the pool and you have a leak on the filter it could be a check valve problem.
With it competly loosing the prime it sounds more like a suction leak. This will be in the plumbing and will need a re-plumb or it could be as simple as a lid "O" ring or cracked lid.
What happens is the air get's in the tank and air will compress when under pressure. Then when the pump shut's down the air can expand again. When it does it will rush back through the system and blow the prime right out of the pump. Quite often you will see water blow out of the skimmer or just blow the skimmer lid off. I hope this helps. Good luck.

Sep 09, 2010 | Tristar Hayward 15 Hp Inground Swimming...

1 Answer

When I backwash or rinse my pump reservoir fills to the top when I filter I have air bubbles at pool discharge and reservoir about 3/4 full and air is evident. Do I need to start digging up my skimmer line...


When backwashing or rinsing the same water is used as in filtering.(skimmer and main drain) so I don't think skimmer damage is the issue. Check if the pool water is low at the skimmer after the backwash cycle, Also check to see if the skimmer weir gate (flapper) is stuck in the upright position. I would suggest 2 main checks. Fill the pool higher than usual, back wash, ensure the pool water level is 1/2 way up the skimmer level and try again. Also, if your lines are valved right, shut off the skimmer during the filter cycle and see what happens. Lastly, the gasket on your multi-port valve may be bad.

Jul 16, 2010 | Hayward 3/4hp Super Pump Inground Pool...

1 Answer

Just had pool opened. They turned port dial to 2


Welcome to FixYa
Dear Sir/Madom,
If your skimmer is tied to your main drain, then both holes have to be uncovered for your skimmer to work.
If you have a separate line all the way back to your equipment from your main drain, then you may want to try to open both holes in the skimmers. Turn off your Unit to unscrew the retaining screw on the valve, and then slide the big end over.
If you've not had your pool run all winter, then you may have leaves/debris caught in the line.
If so-you can swing by a plumbing supply house and get a powerflush hose attachment.
  • Make sure that none of the holes in any of your skimmers are covered by the oval tab in the skimmer.
  • Then, if you have any valves on the inlet to pool pump, rotate them in such a manner to isolate the skimmer line that isn't working, making sure that it is open.
  • Place the hose and powerflush device in the upper inlet port of the pool pump, with the pump lid/cover and basket removed. Then, pressurize the line back to the pool with tap water.
  • If it doesn't release right away, then let it sit a little while, as you may have to "pulse" it as water pressure drops as water leaks around the clog.
  • Pulsing it means to turn the water on for a few minutes, then turn it off. Then, turn it back on, and then turn it off again.

Look down into the bottom of the skimmer. It will have either one or two holes, depending on your model. These holes are where the pool plumbing attaches to the skimmer. Most skimmers have threads inside the holes, and a copper or PVC threaded fitting screws into these ports. Squirt food coloring just above the holes and see if any of it is pulled down into them. This indicates a leak which may be caused by a poor seal between the skimmer threads and the fitting. If you put your finger into the holes, you should be able to feel where the top of the fitting meets the skimmer threads.Repair any cracks or breaks in the skimmer walls with epoxy putty.Use the silicone sealer to repair areas where the skimmer has pulled away from the pool wall, where the corners are cracked, and in tile cracks. These leaks are the result of a cracked bond beam or shifting soil from water getting into the ground around the skimmer.
Also Check this Link
I hope you got an idea...thank for Using FixYa...

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1 Answer

Cannot get pool pump to prime


turn the valve to main intake line (not the skimmer) and flood the pump with as much water as possible.
make sure there are no areas around the seals where air could get sucked in. when you get a full flow switch it to skimmer and main.

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1 Answer

My pump will surge on, run for a while and shut off, then start up again. Unplugging and replugging makes no difference. What to do?


Check to be sure water level is up where it belongs then check to be sure your skimmer weir door is free. If this is stuck water in the skimmer will run the pump for a moment then the water will run around the door and fill the skimmer to start the cycle again.

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