Question about Hayward 48 Sq Ft Pro Grid Vertical Grid De Pool Filter

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We have a hayward pro grid de filter. while vacuuming we are losing pressure real fast. what could be causing this?

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  • Stephen Dorje
    Stephen Dorje Jun 06, 2010

    How fast is fast? Minutes, seconds? What is the tank pressure on start up and when pressure is lost?

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Air in line or dirty filter

Posted on Jun 15, 2010

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1 Answer

I have to run my de4820 on recirculate otherwise my pump loses the prime. when I run the filter on recirculate it runs great. any idea why it runs better when I bypass the filter?


while on recirculate, the water is not being filtered but just returning to the pool. the first thing i would suggest is doing a bump of the grids and let them recoat with media.

Jun 01, 2014 | Hayward 36 Sq Ft Pro Grid Vertical Grid De...

1 Answer

Will a tyni tear in one of the grids let the de powder back in the piool


yes, you can replace the single grid or all of them if it's more than a couple of years old.

Aug 12, 2010 | Hayward 48 Sq Ft Pro Grid Vertical Grid De...

1 Answer

I cannot get the filter element cluster to release from the outlet elbow on my Hayward vertical grill filter. Any suggestions?


You did release the catch ... right? It should just lift out ... off the pipe and off the rod holder onthe other side ... wiggle it if necessary.

Aug 07, 2010 | Hayward 48 Sq Ft Pro Grid Vertical Grid De...

1 Answer

I have the Hayward EC-40 Filter, my problem is the DE is getting into the pool. What would cause this?


Broken/torn grid, o-ring bad in the housing by the grid assembly or grids not in manifold properly. Backwash, open the filter, remove and inspect the grids (the plastic bases too).

Jun 05, 2010 | Hayward EC-40 DE Pool Filter with pump

1 Answer

I just replaced the grids in my filter, now when i turn it on water pores from the top of the filter, what would cause this? the filter is about 7 yrs. old. thanks.....


LOOK TO SEE ALL GASKETS ARE IN PLACE .. I USE MAGIC LUBE I FIND IT THE BEST TO COAT YOUR O-RINGS WIT SO THEY SEAT PROPERLY. .. IF'N I WAS ANY HELP VOTE FOR ME ...THANKS.. JAY

May 23, 2010 | Hayward 48 Sq Ft Pro Grid Vertical Grid De...

1 Answer

I'm getting DE back in my pool from the 4820 filter


One of two things can cause this. Either the spider gasket is bad or there is a rip or tear in one or more of the filter grids.
P.S.
(the spider gasket is inside the valve you turn to backwash filter)

Mar 25, 2010 | Hayward 48 Sq Ft Pro Grid Vertical Grid De...

1 Answer

Why is my harward pro grid de filter shooting out all the debris it collects? It will collect and hold it all day until it restarts the following morning and then it will shoot the de and all other debris...


Chances are you have a torn grid inside, sometimes debris will cover the tear while it's running, then when the pump shuts off the debris settles to the bottom of the tank. Then when the pump turns back on, it shoots DE and debris through the tear until something else plugs it. Tear the filter down and inspect the grids, replace as necessary.

Nov 16, 2009 | Hayward 48 Sq Ft Pro Grid Vertical Grid De...

1 Answer

Losing pressure 2-3 min vacuum hose is attached to skimmer


de filters clog very fast i suggest put vac in pool put hose over pool attach a wet vac to get water out of hose remove wet vac and vac saves de and water

Jul 09, 2009 | Hayward 1HP Super Pump II Inground Pool...

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