Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 6 of 6

Thread: How do you know what the psi should be?

  1. Back To Top    #1

    Join Date
    Jul 2007
    Location
    Philadelphia
    Posts
    17

    How do you know what the psi should be?

    My pool is 16 x 38 fiberglass, 3.5 to 6.5 deep. (I don't know the size of the pipes.) The psi has been at 20-22 since opening. I thought it was at 12 last summer but can't really remember. The gauge goes to zero when off so I don't think it's a bad gauge.

    Is 20 psi too high? If it is, what does that mean?

    Thanks.

    tlbb

  2. Back To Top    #2
    Guest

    Re: How do you know what the psi should be?

    what kind of filter do you have?

  3. Back To Top    #3
    mas985's Avatar
    Join Date
    May 2007
    Location
    Pleasanton, CA
    Posts
    9,903

    Re: How do you know what the psi should be?

    Assuming you can trust the guage and it is higher than normal, a dirty filter is usually the cause. Have you backwashed (DE & Sand) or cleaned (Cartridge) the filter recently?

    Also, a guage can be still bad even though it goes to zero when the pump is off. Given that you are in freeze country, you might want to check the guage too.
    Mark
    Hydraulics 101; Pump Ed 101; Pump and Pool Spreadsheets; Pump Run Time Study; DIY Acid Dosing; DIY Cover Roller
    18'x36' 20k plaster, 1/2 HP 2sp pump, Aqualogic PS8 SWCG, 420 sq-ft Cartridge, Solar, 6 jet spa, 1 HP jet pump, 400k BTU NG Heater, ThePoolCleaner

  4. Back To Top    #4
    reindeerboy's Avatar
    Join Date
    May 2008
    Location
    Jamestown, ND
    Posts
    514

    Re: How do you know what the psi should be?

    I have a sand filter and the psi is 20. Has always been that way. Talked to a pool mechanic and it depends on a bunch of things including your filter size. Its not unusual for sand filters he said to consistantly have that when you only have a couple returns in the pool. I am not a pool mechanic by no means, but I have talked to numerous people about it and have had the pool 2 years with no problems.

    I plan to change my sand/laterals next year and then we will see what happens after that.

    Thought I would chime in to let you know that its not unusual.
    Chad R.

    POOL SIZE: 16 x 32' Vinyl lined pool. 22,000 gallons. 8' deep. 2009 Hayward 1.5 HP Super Pump. Hayward S310S 30" 500 lb Sand filter. 1 skimmer and 2 returns. Solar Blanket.

    Pics of my pool: http://s307.photobucket.com/albums/nn312/reindeerboy/

  5. Back To Top    #5

    Join Date
    Jul 2007
    Location
    Philadelphia
    Posts
    17

    Re: How do you know what the psi should be?

    Thanks for the responses. I have a sand filter (duh, should have mentioned that). I have three returns. One on the deep end near the bottom, on in the middle of the pool and one in the shallow end.

    The last backwash was about 3 weeks ago and it did not change the pressure at all. The water has been really clear and my numbers have been great. This filter pressure is the only thing that's been bothering me.

    I also noticed that our filter and pump have sunk about one inch since last season. The guy who installed our pool set the equipment (heater, filter, pump) on two concrete squares that were placed on a pile of gravel on a slight slope. The heater is on one and the filter and pump on the other. Should I be worried about this? How could I shore it up?

    tlbb

  6. Back To Top    #6
    mas985's Avatar
    Join Date
    May 2007
    Location
    Pleasanton, CA
    Posts
    9,903

    Re: How do you know what the psi should be?

    Backwash one more time and see if the pressure drops. If not and you are sure that the pressure was 12 PSI last year, then I would guess it to be a bad pressure guage. You can always get a new one and if it reads the same, then return it.
    Mark
    Hydraulics 101; Pump Ed 101; Pump and Pool Spreadsheets; Pump Run Time Study; DIY Acid Dosing; DIY Cover Roller
    18'x36' 20k plaster, 1/2 HP 2sp pump, Aqualogic PS8 SWCG, 420 sq-ft Cartridge, Solar, 6 jet spa, 1 HP jet pump, 400k BTU NG Heater, ThePoolCleaner

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •