My Hayward pool pump works fine when it is on filter but when I backwash the filter and rinse the pump looses prime. I don't know what causes this and I'm kinda lost
Pool pump prime loss
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- Last Post 16 May 2018
Chevyredneck37
posted this
15 May 2018
InyoRob
posted this
16 May 2018
We'd be glad to assist you. Make sure the water level in the pool is good. Take a look at the skimmer when the filter is backwashing to see it is struggling to get water.
Do you have any air in the system when the valve is in the filter position? You'd want to look in the pump lid and at the return jets for any air bubbles.
What is the make and model of your filter?
Chevyredneck37
posted this
16 May 2018
My water level is a little over halfway full in the skimmer I've got a hose in it now to fill it up more and see if that fixes it. There is just like 3-4 air bubbles in the pump lid. I'm not sure of the model of the filter but I know it's made by Hayward and I'm thinking it was d18 but I could be wrong
InyoRob
posted this
16 May 2018
Below is a list of some common problem areas for air leaks.
Pump lid O-rings are a habitual offender of air leaks. The O-ring can expand or deteriorate over time and allow air to enter the pump. You can try applying a silicone or Teflon lubricant to see if it helps, but often times it needs to be replaced.
Plumbing fittings will also draw air. A popular technician trick is to use burning incense. While the pump is running, wave the burning incense near suspected areas. The smoke will be drawn in, if there is a leak. Check the fitting on the pump intake, the couplings and elbows. Cut out and replace any fittings that have an air leak.
Valves can be inspected like the plumbing fittings. Diverter valves will usually have internal O-rings. These O-rings can easily be replaced to fix an air leak. Simple ball valves are not usually repairable and need to be replaced, if there is a leak.
Drain plugs are found on most pumps. These plugs are usually used to drain the pump when a pool is winterized. They should be tightened firmly into the pump. Inspect the drain plug and drain plug O-ring. Replace them if they look decrepit.
