Question about Hayward EC-40 DE Pool Filter with pump

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Water and de backflo into motor from filter

When I turn the flo valve that enters the pool to the off position to clean out the skimmer, the water from filter flows back into skimmer through the motor. Filter is clean, motor is new, pressure of water into pool is bad when turned on Which piece of the system has a problem?

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Try checking the users manual. I don't have an exact answer for you, unfortunately, but the users manual for these pool filters is comprehensive and has diagrams. Hopefully, you can find your answer there.

http://www.backyardcitypools.com/images/hayward/perflex-system-manual.pdf

Posted on Sep 08, 2010

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Lo flo pool power rp23


Clean your filter,...
... just a slight sensing of "Lower" water flow, may trigger the sensor to read not enough water flow. Also check your impeller, your skimmer baskets & the hair and lint pot basket at the pump.
If all those are confirmed as clean & clear - then you may have a faulty flow sensor.

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Hayward vari flo valve on filter also comeing out waste at same time


Yes, it is the "spider" gasket inside the valve that has gone bad. It needs to be changed out. They are not expensive. Go to YouTube and enter "change spider gasket" there are several videos. Good luck with it!

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That would likely be FLO... Check to be sure you have good strong water flo at the jets returning to the pool or spa... Check your filter to be sure you have cleaned it properly. A dirty filter will reduce flo and result in the heater not working if the water flow is too low.

There unfortunately a large number of factors to be able to provide much more information without a detailed description of your equipment, the layout, valve positions and condition of the equipment.

Aug 12, 2012 | Jandy Pool & Spa

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I have a 20,000 gal in ground pool w/ Hayward 36 sq ft de upright filter, Hayward Vari-Flo valve. Actual suction at the skimmer has gotten very weak, (filters and traps clean) It does better in...


You say that you can see a large flow through the pump cover but that water must be coming from the pool somehow. It must be coming through the main drain. If you turn the main drain off then the flow from the skimmer should increase considerably. If it doesn't the issue could be caused by a nearly plugged line between the skimmer basket and the pump. I have had similar symptoms and I started by using a drain jet device on a hose to force water backwards from the pump to the skimmer with the main drain valve turned off. I couldn't clear the plug so I had to dig the line up and found a bad area of the piping where it made a reduced pipe size 90 degree turn. Sycamore bark, leaves and twigs were stuck at that pinch point.

I hope this helps.

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Good morning...I have a DE Hayward Sand Filter and yesterday after I was done vacuuming the pool I set the valve back on the FILTER position. However, instead of filtering it was filtering water out of my...


this usually happens when the gasket inside the dial valve has been compromised and ruined. It allows water to drain out and sometime the sand to go into the pool.
you will need a repair kit for the dial valve and that should solve your problem

US Parts Center

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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.

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No suction from hayward variflow pro series sand filter


Try these tips. I am guessing that one of these is the reason that your pool filter is not working properly. If you try these suggestions and they don't work, let me know and I will trouble shoot with you again.
1. Check skimmer and pump strainer baskets for debris.
2. Check for restrictions in intake and discharge lines.
3. Check for air leak in intake line (indicated by bubbles returning to pool.
4. Backwash your filter.
5. Be sure Vari-Flo valve is set on “Filter” position.

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1 Answer

My pump will not push water back into pool,what could be the problem?


check pump basket make sure its clean if you have de filter it is dirty back wash and add new de make sure all valves are open

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If the pump is above the pool water level the it is unlikly that the tank will fill completely with valves open (which is ok).Most pumps are self priming and will pick up a prime with water level below suction inlet on strainer. Try starting on main drain again and slowly open skimmer line. Did you remove water from skimmer line and winterize(if in cold weather climate)during closing?.I know this sounds stupid, but make sure water level in pool is well into skimmer. If air situation remains after scspriggs' and these thoughts then prepare for a pressure test on skimmer line to determine location of leakage.

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Using a hayward vari-flo valve model SP 710x32


Do not drain a vinyl liner pool mor than half way....ever... If you have a fiberglass, or gunite pool it is important to pull the hydrostatic plug under the main drain cover. If you live down a hill, or where there is a high water table, the water pressure underground can lift the empty pool out of the ground (more common in fiberglass pools). If you have a sand or DE filter switch the valve to waste. make sure that you have the skimmer turned off, and the pump is only sucking from the pool main drain (spa drain closed also), and turn the pump on. Make sure the waste hose is far enough away so you dont add any hydrostatic pressure.

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