This is probably the biggest pain and hassle of running a DE filter. Note: if you have a DE filter that has not been fully disassembled and cleaned recently you may need to have it fully disassembled and cleaned as well. Dangerous filter pressure - If you do not have a functioning pressure gauge on your filter then you would have no idea if the pressure of the filter was dangerously high. Most DE filters need an annual complete cleaning.I have no documentation on the unit. powder in the filter, or too much DE powder. Swimming pool information, pool care, pool water discussion forums & swimming pool problem helpUsers browsing this forum: No registered users and 0 guestsI am backwashing with increasing frequency because the pressure climbs too soon. But the skimers sucking power gets progressively worse as time passes then by the time the pressure is to high, there is no suction at all in the skimmers. Why is the pressure building so fast? We are here to help you with information and advice on pool maintenance, pool repairs and swimming pool building. I have a Hayward 3620 DE filter and i have been having trouble with it running a short time then needing a back wash..the problem is after i backwash and recharge filter i only get about 1 hour before the pressure is 30 psi..it starts at about 19 psi...so i did acid wash with my grids and I got about 2 hours of run time then pressure was back up to 30 psi...i'm stumped. ft. of filter surface area – for a completely clean filter, with no DE in the tank at all. After backwashing however, 30-50% of old DE is still in the tank, so you don’t need so much, perhaps 1 lb of DE powder for every 8 sq. Once all the DE is added, take a reading of the filter’s pressure gauge. By kcd1369 in forum Pool Equipment & Operations I have a Pentair FNS Plus 60 DE Filter. A backwash only gets rid of about 50% of the DE in the tank. Check the flow of filtered water going back to the pool. Most DE filters should use a 1 lb (32 oz dry measure) of DE powder for every 5 sq.

This year when I vacuum or backwash the pressure starts at around 10 PSI and quickly climbs to 25PSI. Most DE filters need an annual complete cleaning. Please help, thanks. I also tried new de filter grids without any success. A pressure gauge reading of 5-10 psi above your recorded normal pressure is an indication that your filter is dirty and needs cleaning. That is where you take it apart and clean "all" of the old DE out of the filter. My pool is 16000 gallon in ground. I Normally put in 1-2 cups. I have a Pentair FNS Plus 60 DE Filter. I have a Hayward filter as well and last year had no issues. Perhaps there is not enough D.E. Once I backwash the filter, the pressure is fine. Get your answers by asking now. You … When the pressure rises 8-10 PSI above the starting pressure, it is time to backwash or clean the filter. get alkali right first then go for the pH. As the filter clogs, the flow rate decreases. I installed a new DE Hayward Pro Grid filter this season. your water is just that dirty. A backwash only gets rid of about 50% of the DE in the tank. Our 12940 members have posted 18854 times in 7565 discussions
The first couple times that the pressure reached, the "needs cleaning" mark, about 21 PSI, a backwash would return the pressure to the "good mark," about 11 PSI, and the pressure would slowly raise over a few months to the "needs cleaning" mark again. This is normal. You must enable JavaScript to be able to use this site in full When pressure rises it is time to backwash the filter if you have that option with a sand or diatomacesous earth (DE) filter. 14'x31' kidney 21K gal IG plaster pool; SWCG (Saline Generating System's SGS Breeze); Pentair FNS Plus 48 DE DE filter; Whisperflow 1 HP pump; 8 hours hrs; kit purchased from Ben; utility water; summer: none; winter: none; PF:5.7 Check the flow of filtered water going back to the pool. i figure DE is cheaper than a truck of water. The first couple times that the pressure reached, the "needs cleaning" mark, about 21 PSI, a backwash would return the pressure to the "good mark," about 11 PSI, and the pressure would slowly raise over a few months to the "needs cleaning" mark again. my pool i opened up and the filter would do it in a few hours.

Pool filters (and most pool equipment) is designed to operate normally up to 30 PSI. Is it time to get new grids? Ft model based on feedback from intheswim. By rinsing the rough debris off of the elements this will allow more freeboard in the elements to reduce the pressure through the filters. Talk to your pool expert.It is probably fine. As the filter clogs, the flow rate decreases. I have a Pentair FNS Plus filter system and a 55,000 gallon pool. This is normal. I Normally put in 1-2 cups. One pool store worker suggested that I may not be adding enough DE after each backwash. By wilhouse in forum Pool Equipment & Operations Open it up and check everything just to be sure.Still have questions? Why is the pressure building so fast? My pump is a Hayward Super Pump VS Variable Speed. I actually have the same problem as the OP. I chose the 24 sq. Perhaps you are not running the filter pump long enough each day. If I stop the pump and move back to filter and come back the pressure returns to 10PSI. I have a Hayward 3620 DE filter and i have been having trouble with it running a short time then needing a back wash..the problem is after i backwash and recharge filter i only get about 1 hour before the pressure is 30 psi..it starts at about 19 psi...so i did acid wash with my grids and I got about 2 hours of run time then pressure was back up to 30 psi...i'm stumped. Also most pool equipment has a maximum pressure rating of 50 PSI and the area between 30 and 50 is your safety margin as a pool owner. If it is normal, don't worry about the pressure. If it is normal, don't worry about the pressure. The pump will draw in the DE and send it into the filter, where it coats the grids or Flex tubes. When to clean the filters.

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