Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 5 of 5

Thread: Anti-siphon advice

  1. Back To Top    #1

    Join Date
    Jun 2014
    Location
    Edmond, Ok
    Posts
    3

    Anti-siphon advice

    First post. Pool had line built in to hook to sprinkler system for daily/scheduled filling. I hooked it up on a zone with other sprinklers and it filled as planned. However, the sprinkler system is designed to drain from lowest sprinkler when zone goes off which caused a siphon from pool. I tried a couple of pvc backflow valves which didn't work. It appears i need an anti-siphon valve, but all i'm finding require above ground plumbing (12" above highest sprinkler). Is there a way to solve this problem without above ground plumbing?
    Gunite 18x36 kidney shaped pool with in floor cleaning jets. Pentair 2 hp pump, quad filter, 400 btu heater. Chlorine with ozone generator.

  2. Back To Top    #2
    Richard320's Avatar
    Join Date
    Jan 2010
    Location
    San Dimas, CA (LA County)
    Posts
    20,299

    Re: Anti-siphon advice

    I'd like to see a picture of this setup. Seems to me that if you had an air gap -- the filler outlet stays above the water level -- then it couldn't siphon.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

  3. Back To Top    #3

    Join Date
    Jun 2014
    Location
    Edmond, Ok
    Posts
    3

    Re: Anti-siphon advice

    The filler outlet is 12-18" below the waterline
    Gunite 18x36 kidney shaped pool with in floor cleaning jets. Pentair 2 hp pump, quad filter, 400 btu heater. Chlorine with ozone generator.

  4. Back To Top    #4
    Mod Squad Bama Rambler's Avatar
    Join Date
    Jun 2009
    Location
    SouthWest Alabama
    Posts
    22,702

    Re: Anti-siphon advice

    I'm not sure why a check valve wouldn't work. It should only allow water to flow into the pool, but not back out of it. You may need to get a spring loaded one to ensure it closes when there's no forward pressure.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

  5. Back To Top    #5

    Join Date
    Jun 2014
    Location
    Edmond, Ok
    Posts
    3

    Re: Anti-siphon advice

    Thanks, i'll try one.
    Gunite 18x36 kidney shaped pool with in floor cleaning jets. Pentair 2 hp pump, quad filter, 400 btu heater. Chlorine with ozone generator.

Posting Permissions

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