Question about Garden

2 Answers

Pentair whisperflo 3/4 hp left running over an hour with no water

I was cleaning the pool and was called away and turned off the water to my pentair pump. I came back 1 to 1.5 hours later with the pump still running and hot. I does run but will not pull water from the pool. I have a valve between the pump and the filter that shows some sign of pressure when I open it when the pump is running. Does anyone know the answer to my problem.


Posted by on


2 Answers

  • Level 1:

    An expert who has achieved level 1.


    An expert whose answer got voted for 2 times.

  • Contributor
  • 4 Answers

The threaded fitting on the suction side has melted and is letting air in. You'll first have to replumb that to find if there's any other damage. It's possible that's all that's wrong.

Posted on Sep 12, 2009

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 20 achievements.


    An expert that got 10 achievements.


    An expert that got 5 achievements.

  • Master
  • 10,865 Answers

Sorry to have to tell you but you are going to have to either have your pump rebuilt or replaced. Sounds like you baked the plastic impeller and maybe did even more damage. These pumps require water in order to keep cool.

Posted on Jul 02, 2009


1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

2 Answers

Pentair Intelliflo vs. Need bearing replacement for front and back bearings

Pentair WhisperFlo Pool Pump Motor Bearings Replaced ...

? 2:03
Jul 10, 2012 - Uploaded by Pump Repair Supply
More Help & Information: Watch as Joseph shows you how quite your Pentair

Sep 27, 2015 | Pool & Spa

1 Answer

Pentair chlorinator tablets not dissolving. Also the dispenser tube loses water level when pump is down.

make sure water is running into unit take off top see if water rises run about 3.5 let water rise then close top

Aug 08, 2013 | Pentair 2.0 Hp Whisperflo Pump

1 Answer

When I turn on my pool filter with a Pentair WhisperFlo 2 hp pump, the psi has jumped from 18 to 30. There's nothing visible in the baskets in the skimmers or in the WhisperFlo. Where could the resistance...

If your pressure has gone up, the problem will be on the discharge side of the pump. First, make sure that your gauge is not malfunctioning.
Next see if all valves after the pump are set properly and that the three way valves or backwash valve are not broken inside.

Is this helpful?

Feb 28, 2011 | Pentair 2 hp WhisperFlo InGround Pool Pump...

1 Answer

How do you replace an impeller on a 1.0 hp Pentair Whisperflo pool motor

Remove the bolts that hold the 'wet end' of the pump to the 'dry end'. If the impeller is held on with a screw, it is a 'left-hand' tighten which means it turns the opposite way of normal screws. Be careful not to damage the impeller. Any scoring on it will effect its performance and it will only be worth doing if everything goes back together cleanly and properly. Replace and lube all O-rings with silicone lube. Make sure all bolts are tightened and do them in an alternating fashion to ensure that you get a good seal.

May 28, 2010 | Pentair 1.0 Hp Whisperflo Pump

1 Answer

My 3 year old pool pump whisperflo is running a louder. What do I need to check?

Loud operation is an indication that the bearings need replacing. A local small motor repair shop can probably get it done for $70 or less. Call around...

Apr 18, 2010 | Pentair 3hp Whisperflo Pool Pump In -...

1 Answer

Pool pump won't prime

check for air leaks, cover o-ring is common culprit. anything in front of pump can cause this.

Jan 17, 2009 | Pentair 1.0 Hp Whisperflo Pump

Not finding what you are looking for?
Garden Logo

Related Topics:

236 people viewed this question

Ask a Question

Usually answered in minutes!

Top Garden Experts

Dennis Key
Dennis Key

Level 3 Expert

2478 Answers


Level 3 Expert

708 Answers

john h

Level 3 Expert

14512 Answers

Are you a Garden Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides