Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 2 of 2

Thread: Made some changes and now the pressure is up!

  1. Back To Top    #1

    Join Date
    Mar 2015
    Long Island, NY

    Made some changes and now the pressure is up!

    Hi, I just installed a new Rheem gas heater to replace my old heat pump, and a new whisperflo pump. The other major difference is before I had piped the system with the flexible piping so there were no 90 degree turns, now there are several elbows and hard pvc piping. Thing is the pressure gauge on the filter reads much higher than before. Used to be after a new load of DE the gauge would read 15 lbs and I would backwash at between 25 and 30 lbs pressure. Now on start up the gauge is reading about 24 lbs. Is this going to be my new normal reading? Will I now wait to 40 lbs to backwash? Or is there something wrong? I did backwash once already and the reading stayed the same at 24 lbs. What do you think? Thanks.
    Long Island, NY. 18x36 vinyl liner pool installed 1992. (new liner about 2012.) 1.5 hp whisperflo pump (new 2015) with a hayward de filter (new 2005). Rheem natural gas heater 336k btu (new 2015). I'm rebuilding it a piece at a time.

  2. Back To Top    #2
    Mod Squad jblizzle's Avatar
    Join Date
    May 2010
    Tucson, AZ

    Re: Made some changes and now the pressure is up!

    That is your new normal reading. The heater may have added more head loss and the new pump may be more powerful.

    You should always clean the filter when the pressure rises 20-25% over the clean pressure. Before you were waiting WAY too long. Now you should clean it around 30psi.

    Also you should disassemble the filter for a good cleaning yearly at the minimum: DE Filter Cleaning Tutorial
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
    Pool School + Test Kit + PoolMath = A TROUBLE FREE POOL
    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

Posting Permissions

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