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Thread: pump leak at seal head and motor

  1. Back To Top    #1

    Join Date
    Jun 2014

    pump leak at seal head and motor

    Hi everyone. First off, thanks to all the active members who have provided me with a ton of useful info (through old forum responses) since we bought a house with a pool a year ago.

    I've spent the past several hours scanning the web for help with this problem to no avail. I've got a Pentair Challenger pump that has been having some issues. Bought a repair kit, opened up the wet end of the pump, cleaned it up, and replaced all o-rings and the seal head and mating ring. This fixed my previous problems (air bubbles in the returns, low pressure, etc.), but it is now leaking where the motor meets the seal plate. Basically, it seems like some water is passing through the seal head and mating rings (part #4 in the linked schematic below) and entering the motor thru. the shaft. I took it apart again, re-set everything, and it is still leaking. Nothing looks off, but there's a solid drip every second or two, and I'm worried the water will fry the motor if I leave it on for long. Any help would be greatly appreciated.

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

    Re: pump leak at seal head and motor

    With that seal leaking, it's just a matter of time before the bearing starts rusting and after that starts, the end is very near.

    I have no tips or tricks, just thought I'd give it a
    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
    Jul 2011
    Perrysburg, OH

    Re: pump leak at seal head and motor

    Are you sure you got the right seal and installed it properly?
    16 x 32 inground vinyl pool (21000 gallons) (new liner installed 2014)
    Hayward max flo pump w/ 1 HP AO Smith motor (new motor 2014)
    Hayward C1200 cartridge filter (new 2014)
    Hayward H150 heater

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