Question about Hayward Pool Products 25 Sq Ft Micro Clear Filter System w/ 40 GPM Pump

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Filter is running with very low psi

Our microclear de filter is running with very low psi, any ideas on how fix it

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First make sure your gauge is reading correct. Put your hand infront of the pool's return..if it feels good and strong, then the gauge could be bad. An air leak somewhere in front of the pump could also be a problem. Check all hose clamps, o'rings in any unions or valves infront of the pump could be bad or missing or the cover gasket on your pump basket could be bad

Posted on Jun 20, 2009


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Posted on Jan 02, 2017


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Breathing tube clogs within a day or 2 after cleaning. Pool water is clear and clean but psi goes from 10 to 15 in 2 days.

have you done a total clean on the filter? over time DE can build up in the bottom of the filter tank and significantly reduce filter are causing high pressures.
see if you can pull the bottom drain plug and remove the lid of the filter (do this on a shady day or in low light conditions) grids do not like sunlight and will shorten their life. rinse out the filter's base with a garden hose.
OR if the pool is dirty it will take time to clean it you will need to continuously flush the filter until pressures drop

Jun 26, 2017 | Pool & Spa

1 Answer

Olds 98 regency

May be the filter it's capped or the avaporative panel it's capped too with fine dust. Clean de filter and check tehe avaporative panel an cleaned too. Or, if the a/c it's working with low pressure in sucction side , may be need more refrigerat. Check this, thoe pressure in low side is 65 psi. but if the pressure is lowest than this may have a little leak and need fix it..

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1 Answer

Ac does not cool low side at 50 psi after putting in 1 lb of rerigerant changed out filter, orrfice tube and pressure the same

The low side should be 25 to 45 psi when the compressor is running, and 75 psi to 100 psi on a hot day when the compressor is not running.

Aug 09, 2010 | 1987 Buick LeSabre

1 Answer

My new ec50 is clogging frequently. Is at 18 psi

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

Jun 15, 2017 | Hayward EC50 SYSTEM W/ 1 HP MATRIX PUMP...

1 Answer


Usually caused by low pool pressure at the filter. The barracuda works best between 12 and 18 psi. I have seen it work as low as 10 psi. The problem i have found is the intake lines have some debris in them that causes the flow to lessen, Best thing to do is pressure check your intake lines and to clear any debris. I had this problem for several weeks until I cleared all my lines, It now runs beautuful at 12 psi on filter gauge

Aug 17, 2009 | Zodiac BARRACUDA G3 IN-GRND CLEANER

1 Answer

I installed a new pentair de filter and new multiport valve. at start up the filter pressure reads 40 psi. after multiple backwashes and rinses the pressure goes down to about 15 psi but slowly climbes...

If the pressure is 15 psi on recirculate, and high on filter, the problem is the filter itself, or the valve plumbing. The DE filters are unusal in the fact that they are plumbed like a sand filter, NOT the cartridge filter. If you could give details as to which filter AND multiport valve you have (look on sticker for model number on valve) it would help to figure out if the problem is in the filter or valve.

Jun 26, 2009 | Pentair "Pentair" In Ground Pool Pump ...

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Jandy 1.5 hp pump with jandy ae 2500 heat pump low flow


Jun 01, 2009 | Jandy Pool & Spa

1 Answer

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.

May 25, 2009 | Hayward 3/4hp Super Pump Inground Pool...

2 Answers

My pool pump pumps water, return is low pressure

fix any air leaks on suction side of pump. Check valve positions.
Clean filters...may need to replace cartridges in cartridge filter, or take out D.E. grid assembly and clean it on a D.E. filter, or change sand in a sand filter...

Mar 26, 2009 | Pool & Spa

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