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

Thread: GPM Flow meter for heater line

  1. Back To Top    #1

    Join Date
    Jul 2008
    Location
    Flintstone, GA USA
    Posts
    112

    GPM Flow meter for heater line

    Just installed Hayward 250,000 BTU natural gas heater and it says to install a flow meter to make sure you are getting the proper water flow through the heater. Where can I find one that does not cost an arm and leg. Also does it install between the filter and the heater inlet port or does it install between the heater return line and the chlorinator?

    Any help would be greatly appreciated.

    Thanks
    Tom

    18 x 36 Grecian Polynesian Fiberglass Walls with Concrete bottom - 3 ft to 9 1/2 ft. deep -
    Hayward Variable Speed Super Pump SP2600VS 1 1/2 True HP,Hayward sand filter S200, and Hayward auto clorinator. Hayward 250,000 natural gas heater. PoolKeeper automatic water leveler. Loop Loc Ultra Solid Safety Cover. Hayward Color Logic 12 volt light. Dual Pool Deck Jets.
    Polaris 380 auto cleaner. Trouble Free Test Kit TF-100.

  2. Back To Top    #2

    In the Industry

    duraleigh's Avatar
    Join Date
    Apr 2007
    Location
    Sebring, Florida
    Posts
    30,082

    Re: GPM Flow meter for heater line

    Hi, Tom,

    Few people use a flow meter.....while convenient, they simply aren't required. The price is always high, to my knowledge.

    While I do not have a heater, I would be happy estimating my flow from the pump curve and the end result of how much heat was entering the pool.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

  3. Back To Top    #3
    mas985's Avatar
    Join Date
    May 2007
    Location
    Pleasanton, CA
    Posts
    11,482

    Re: GPM Flow meter for heater line

    I agree with Dave, you really don't need a flow meter and with a 1 HP pump, there should be no issue at all of having too little flow rate. If you have a two speed, low speed may be a problem but the Hayward heaters should have a low flow switch which will shut off the heater when flow rate gets too low.
    Mark
    Hydraulics 101; Pump Ed 101; Pump/Pool Spreadsheets; Pump Run Time Study; DIY Acid Dosing; DIY Cover Roller
    18'x36' 20k plaster, MaxFlo SP2303VSP, Aqualogic PS8 SWCG, 420 sq-ft Cartridge, Solar, 6 jet spa, 1 HP jet pump, 400k BTU NG Heater

  4. Back To Top    #4

    Join Date
    Jul 2008
    Location
    Flintstone, GA USA
    Posts
    112

    Re: GPM Flow meter for heater line

    Thanks for info. I checked with the local pool supply store and they have flow meters but told me the same thing. I do not need one. He said they only had them because it is a law that all commercial pools have one. He said of all the residential pool he had seen and worked on he never say a flow meter installed on any of them.
    Tom

    18 x 36 Grecian Polynesian Fiberglass Walls with Concrete bottom - 3 ft to 9 1/2 ft. deep -
    Hayward Variable Speed Super Pump SP2600VS 1 1/2 True HP,Hayward sand filter S200, and Hayward auto clorinator. Hayward 250,000 natural gas heater. PoolKeeper automatic water leveler. Loop Loc Ultra Solid Safety Cover. Hayward Color Logic 12 volt light. Dual Pool Deck Jets.
    Polaris 380 auto cleaner. Trouble Free Test Kit TF-100.

  5. Back To Top    #5
    frustratedpoolmom's Avatar
    Join Date
    May 2007
    Location
    SWSuburban Chicago, IL
    Posts
    11,965

    Re: GPM Flow meter for heater line

    The only time my heater won't work on low speed is when the filter is dirty... that's when I know time for a cleaning...the psi guage doesn't budge - but the heater won't work.
    Helpful links: Pool School; CYA/Chlorine Chart
    24' round AG pool, 52" high, Raypak heater; Waterway 2 spd Pump;
    150 Sq ft. Clearwater Cartridge Filter; Former and DISSATISFIED "Pool Frog" owner
    http://www.PerfectlyClearPoolService.com

Posting Permissions

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