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Thread: pump losing prime

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    aussieta's Avatar
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    Jan 2014
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    Langwarrin, Victoria, Australia
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    pump losing prime

    Hi. i have a secondary pump that is dedicated solar heating
    it pumps to black hoses on roof of garage about ten foot head height
    anyway it loses its prime after about 12 hours of being turned off
    this means i can't leave it on automatic as there is no protection to turn off pump if no flow
    there are no water leaks when operating and after primed and running for half an hour there are no bubbles in the return line
    anybody have any tips to try and find where it is drawing in air when turned off.
    thanks,
    Andrew
    SWG inground peanut shaped eco-bright concrete pool
    50,000 litres 13,000 gallons
    Lincoln Salt Chlorinator, 25 gram cell Sand Filter with glass media
    Taylor K2006-C test kit, Taylor K-1766 salt test, Dolphin M500 pool cleaner
    are you taking care of your pool or is the poolshop taking care of you

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    Mod Squad jblizzle's Avatar
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    May 2010
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    Tucson, AZ
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    37,389

    Re: pump losing prime

    Why is it bad for the solar to drain? Most panels are designed to do this by installing a vacuum release valve. If it reprimes when the pump turns back on, I am falling to see the problem.
    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
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  3. Back To Top    #3
    aussieta's Avatar
    Join Date
    Jan 2014
    Location
    Langwarrin, Victoria, Australia
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    Re: pump losing prime

    pump doesnt reprime, just cavitates
    the system does not have a drain back, it is always meant to be full of water
    anyway i think i may have found the problem one ot the union fittings up on the roof was damp
    so i am hoping this was drawing in air when pump is off
    SWG inground peanut shaped eco-bright concrete pool
    50,000 litres 13,000 gallons
    Lincoln Salt Chlorinator, 25 gram cell Sand Filter with glass media
    Taylor K2006-C test kit, Taylor K-1766 salt test, Dolphin M500 pool cleaner
    are you taking care of your pool or is the poolshop taking care of you

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