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Thread: Pump not priming

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    Pump not priming

    My first post on this forum - I've got a Jandy Stealth 2HP pump, just over 1 year old, which I accidentally ran dry for several hours while at work a few months ago. The nearest skimmer had filled with leaves and debris following a storm. I turned off the pump, cleaned everything up, and restarted the pump after allowing it to cool down. It did still work, but since that event, it takes a long time to prime. A few times, I had to manually prime it to get it moving. As of a few days ago, it will no long prime at all. It doesn't draw water, even if I shut down all but one skimmer. However the pump motor does sound fine.

    While this sounds like a suction side leak to me, I'm curious if the previous event would have damaged the impeller? Tonight, I plan to open it up, clean out the impeller and see if there is anything restricting flow there. And, I've ordered a new basket O-ring. The one in place is just slightly twisted, but I don't know if it's enough to cause such a significant impact on water drawing.

    Anyone have further thoughts?

    Thanks,

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    Re: Pump not priming

    Could be a damaged impeller.... first thing I would do is get a blow bag from a local supply store and force water through the skimmer into the pump and see if it grabs water then, also a good way to check for a suction leak is once you manually prime your pump run a garden hose over anything before the pump. i.e. unions 3-way/2way valves and the lid while its trying to prime that will tell you if you have a suction leak
    David Randolph
    Warranty Station
    Pentair
    Jandy
    Owner Sac Pool Pros

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    Teald024's Avatar
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    Re: Pump not priming

    Since it still "kinda" worked after the run dry event, I'd say it is likely the diffuser or the gasket between diffuser & housing. It was probably damaged while running dry and kept getting worse since then. Eventually not priming at all.

    .
    Aqua Leader Elegance AGP 15'x30'x 54", 12k gallons, vinyl J-hook liner ... Hayward/SwimPro Voyager pump SW159412STL, 2hp, 2spd, Hayward/Voyager 175sf element filter SW175MDDVPAKS, Installed August 2016 ... Liquid Chlorine... ...TF-100....CYA/Chlorine Chart...Recommended Levels... Basic Care Schedule...Extended-Test-Kit-Directions

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    Re: Pump not priming

    If the motor still sounds fine it sounds like a gasket issue to me, especially given that it has continued to deteriorate since then. I have been amazed in the past how much difference a new gasket (or two or three) can make. I had a little $0.80 o-ring that was causing my system to lose prime.. sounds like a suction leak to me.
    Overspending on pool chemicals since 2010.

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    Re: Pump not priming

    Always check the most obvious issue......a suction side leak.

    SacPoolPro, what is a blow bag?
    Dave S. - Forum owner
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Re: Pump not priming

    Thanks for all of the great suggestions. It was a suction side leak. First, I got a bladder (blow bag) from Lowe's. It attaches to the end of a garden hose, fits into the skimmer hole, inflates with water to seal it and forces water through the open valve to fill the filter basket at the pump. I wanted to be sure I didn't have any blockage (I didn't). But it still wouldn't prime. I cleaned the impeller, but there was nothing to unclog. Step 3 - I inspected the basket lid O-ring a little more closely and decided that the slight twist might be causing a leak. I took out the O-ring, lubed it, flipped it over so that smooth side will make contact when tightened down, and closed the lid - tightly. And,....it works perfectly. I guess the most obvious some times really is the answer! I ordered a new O-ring to keep ready for the next time I see this. Good learning experience! Thanks for the advice!

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    Mod Squad JVTrain's Avatar
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    Re: Pump not priming

    Quote Originally Posted by duraleigh View Post
    SacPoolPro, what is a blow bag?
    My mother-in-law? :rimshot:

    Glad you found the problem Djones! Those easy, cheap fixes are always appreciated on a pool.
    Joel - TFP Moderator - Minnesota - **Become a TFP Supporter!** Helpful Links: ABCs of Pool Water Chemistry - SLAM Procedure - Chlorine/CYA Chart
    40x20 Pool: 32K Gallons * Vinyl * Bleach Chlorination * Hayward S270T Sand Filter * Pentair SuperFlo 1 HP * Teledyne/Laars Heater * AquaVac Tigershark * TF-100 w/ SpeedStir
    Isolated Spa - 345 Gallons

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    Re: Pump not priming

    My mother-in-law? :rimshot:
    Dave S. - Forum owner
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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