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Thread: Return Flow Question

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    Join Date
    Jul 2013
    Location
    Wichita, KS
    Posts
    55

    Return Flow Question

    I have three returns (2 regular returns and one for the pool cleaner). The two regular returns have different flow coming out. The one closest to the pool equipment comes out pretty fast and shoots up through the surface of the water a bit. The second return is about what I'd consider normal. For the life of me, I can't remember if the flow is the same or more than last year (just put in the pool last year). Does that sound normal?

    For clarification, it does it regardless of just backwashing, or rising pump pressure prior to backwashing? Same flow in either scenario. My pump pressure is usually at 17 PSI (with my new gauge from TFtestkits.com). After about a week, it usually rises to about 20 to 22 psi.
    18 X 36 (21,000 gallons?), IG Vinyl, Tagelus High Rate Sand Filter (Model TA 60/60D - 60 gpm), 1.5 HP Waterway 48 Frame Special Flow Rate Pump (Model SMF-115), Installed June/July 2013, Auto Polaris Cleaner with separate pump, Inline Chlorinator (NOT USING - Using the BBB Method), Waterfall, Stadium Seating Entry, TF-100 w/ SpeedStir (Wichita, Kansas)

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    JasonLion's Avatar
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    May 2007
    Location
    Silver Spring, MD
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    37,879

    Re: Return Flow Question

    Behavior like that is fairly common. It isn't ideal for it to be that way, but it isn't a real problem either. This happens because the plumbing run to one of the returns is longer than the plumbing run to the other return, so the flow rates are uneven.

    If you feel industrious you can balance the flow rate by getting a return fitting that has a larger opening for the return with the higher flow rate, or alternatively getting one with a smaller opening for the one with the weaker jet. The larger opening will slow down the water velocity, while a smaller opening will speed up the water velocity coming out.
    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

    Join Date
    Jul 2013
    Location
    Wichita, KS
    Posts
    55

    Re: Return Flow Question

    Great idea!! Thanks!!
    18 X 36 (21,000 gallons?), IG Vinyl, Tagelus High Rate Sand Filter (Model TA 60/60D - 60 gpm), 1.5 HP Waterway 48 Frame Special Flow Rate Pump (Model SMF-115), Installed June/July 2013, Auto Polaris Cleaner with separate pump, Inline Chlorinator (NOT USING - Using the BBB Method), Waterfall, Stadium Seating Entry, TF-100 w/ SpeedStir (Wichita, Kansas)

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    Mod Squad woodyp's Avatar
    Join Date
    Apr 2010
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    East Texas
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    9,002

    Re: Return Flow Question

    You might wanna angle that return that "shoots up through the surface a bit" downward some so it doesn't contribute to raising your PH.
    16x32x52" Steel Cornelius Miramar AGP Vinyl liner 13,100 gal. Buried 2 ft.
    2 Speed Hayward Power-Flo Matrix 85 g.p.m. 22" 250lb. sand filter hard plumbed
    Pool Rover Jr., Pool Blaster Max, Diver Dave TF100 Test Kit/Speed Stir
    Margaritaville Frozen Concoction Maker, Liqour Chiller, & Drink Mixer & Party Tub----Collect 'um all!

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