Question about Hayward EC50 SYSTEM W/ 1 HP MATRIX PUMP AND CORD -

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My new ec50 is clogging frequently. Is at 18 psi

I am opening my pool for the season and my new ec50 1.5 hp is clogging frequently. Is at 18 psi after de is added. When pressure reaches around 23 which is after about two hours the filter stops working effeciently.I then bump the filter and it starts working properly only to clogg again in an hour or two. I don't believe the system is taking in enough material to clog so quickly. Am I doing something wrong? What psi is the filter intended to be running at.

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Lower the better (psi) this means the water is flowing fast through the filter, high pressures means it's time to clean filter again. keep cleaning until the pool is squeaky clean, then you can go back to cleaning once a week
Jay the pool pump motor repair guy Longwood Florida

Posted on Jun 23, 2017


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Posted on Jan 02, 2017

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SOURCE: Pool Sand Filter

The volume of a 24x4 pool is 1809.6 cubic feet [Volume=pi x radius squared x height, or V=3.14159 x(12x12)x4], and the 18 foot pool is 1017.9 cubic feet [V=3.14159 x (9x9)x4]. When you multiply the number of cubic feet by the conversion factor of 7.48 gallons per cubic foot, you come out with 13,536 gallons versus 7614 gallons. Since the volume is nearly double, I don't think the other filter will cut it for very long. Is the top that is cracked in the valve body or the top part of the tank? It might be cheaper and easier to just replace the defective part in the long run than to use an undersized filter that will die prematurely.

Posted on Apr 16, 2009

SOURCE: my pump pressure is 10psi i cleaned the de filters they seem fine i have good floe out of my jets but when i hook the pool cleaner up pressure drops to almost nothing. could my impeller be the problem

The pressure you are reading is the pressure in the filter tank as water is pumped though it. When the filter is freshly charged, 9 PSI is a good pressure.

As the filter removes particles from the water the filter gets "dirty" -- it takes more pressure to push the water through it thus raising the PSI.

I think you are viewing this in reverse. Low filter pressure is "good" (as long as it stays above 8 PSI) -- as the filter cleans the water the PSI will increase -- when it gets to 15-20 PSI it needs to be back-washed and recharged.

The pressure drops when the pool cleaner is connected because pool cleaners always pull in air (in varying amounts) because of all the hose connections. This causes your filter/tank pressure to drop.

Posted on May 31, 2009

  • 8 Answers

SOURCE: my hayward de filter will not filter over 1 hour

How much DE are you putting in it??? If it is a EC40 then no more than 4 small coffee cans of DE.
If it is an EC65, then no more than 6 - small coffee cans of DE. ( you can even shy back by a 1/2 of can of DE, without any problems.
Is the pool green??? If so, the filter will continue to plug up until clean.
Keep your Chlorine abit on the high side...DE filters run best with a chl reading of 3.0

Posted on Jun 21, 2009

  • 110 Answers

SOURCE: loses suction after 2 hours

Filters are getting blocked.

Clean more offten - use filter socks (if have skimmer box).

OR get better pump/filter system.

Posted on Jul 07, 2009

  • 173 Answers

SOURCE: My Aqua Critter seems to get clogged up pretty

It most certainly is.
The simplest solution, is to sort of half the work for it, by collecting as much leaf litter, as you can with a net, before sending in the critter.
Also, a cover, will drastically minimize the amount of litter entering the water.
Have fun fishing:)

Posted on Jul 26, 2009

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Thank you for posting your question here on

High pressure at the filter means the water is held up and not able to freely flow thru, hence the rise in pressure. If repeated bumps and refills are not working your filter fabric is clogged. You can try to wash them (again I assume) and if necessary even try acid washing as well. If none of these works you'll need to replace the fabric or the entire assemblies which is usually near the price of just replacing the filter.

If this answer does not fix your problem, please comment with additional details prior to rating the answer. Positive feedback is appreciated once your problem is solved!


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If it is tripping the circuit that is usually an electrical problem, and has nothing to do with the motor. Open up that back with the motor off and try to turn that shaft with a flat head, if it turns than it is an electrical problem; if it doesn't then contact Hayward directly for warranty information. Hayward is a pain to get ahold of but they are great about honoring their warranties.

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