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

Thread: Hartford Loop

  1. Back To Top    #1
    GreatCanadian's Avatar
    Join Date
    Jul 2011
    Location
    St. John's, Newfoundland
    Posts
    844

    Hartford Loop

    Hi all,
    I have an AquaPro Pro500 heat pump with perhaps the worst user manual of any product ever produced. The manual states that I should have a Hartford loop in the plumbing. I have some idea of what a Hartford loop is, but not entirely sure. Can someone please describe it to me, and more importantly what it's purpose would be for a heat pump. What I found online is this: "Helps to prevent water from siphoning out of the heater when the pump is turned off.". From my setup (above ground temporary pool) I cannot see how that would happen anyway. Thanks in advance for any help you may offer.
    GC
    13'x22'x52" 8,000 gallon ProSeries Pool with Borates
    Intex 110 pound Sand Filter with Zeobrite, 2650 gph pump, 0.95 hp
    Bestway SWG
    AquaPro ECO500 50,000 BTU heat pump
    GLI Whirlwind Solar Cover Reel, TF-100 Test Kit

  2. Back To Top    #2
    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
    Posts
    37,879

    Re: Hartford Loop

    The idea is to keep the water from draining out of the heat pump even if the pool is drained. You run the pipe above the top of the heat pump and also above the normal pool water level and then install a vacuum breaker valve. That prevents a syphon from forming, which would otherwise drain the water out of the heater.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

  3. Back To Top    #3
    GreatCanadian's Avatar
    Join Date
    Jul 2011
    Location
    St. John's, Newfoundland
    Posts
    844

    Re: Hartford Loop

    Thanks for the response. Why would I want water in my heater if my pool was drained?
    13'x22'x52" 8,000 gallon ProSeries Pool with Borates
    Intex 110 pound Sand Filter with Zeobrite, 2650 gph pump, 0.95 hp
    Bestway SWG
    AquaPro ECO500 50,000 BTU heat pump
    GLI Whirlwind Solar Cover Reel, TF-100 Test Kit

  4. Back To Top    #4
    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
    Posts
    37,879

    Re: Hartford Loop

    If the heater turned on while there wasn't any water in it at all it could be seriously damaged. It would take a major failure somewhere else for this situation to come up, say a large leak, but if that did happen a Hartford loop could save your heat pump. Some heat pumps have hartford loops built-in, others depend on water flow sensors to shut them down when there isn't any water. Apparently yours would like to have an external loop.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

  5. Back To Top    #5
    GreatCanadian's Avatar
    Join Date
    Jul 2011
    Location
    St. John's, Newfoundland
    Posts
    844

    Re: Hartford Loop

    Ahhhhhh...now it's starting to make some sense. That's the first explanation I've heard that made me realize the benefit of a Hartford loop. My pump will shut down with low flow, but I guess the loop is like insurance.
    13'x22'x52" 8,000 gallon ProSeries Pool with Borates
    Intex 110 pound Sand Filter with Zeobrite, 2650 gph pump, 0.95 hp
    Bestway SWG
    AquaPro ECO500 50,000 BTU heat pump
    GLI Whirlwind Solar Cover Reel, TF-100 Test Kit

Posting Permissions

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