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MSGTRETIREDCSP's avatar
MSGTRETIREDCSP
Explorer
Jul 09, 2013

Sureflo 5,7 Water Pump

I've got a Sureflo Extreme Series 5.7 water pump in my rig. The other morning, I noticed the pump was running, but no water faucets were on nor was any water leaking anywhere. The pump will not turn off now unless the power switch at the wall is turned off.

Any ideas on what the problem might be? This pump has not been used alot and I'm hoping I don't have to replace it as they cost $300+. I sent an email to sureflo, but have not heard back yet.

This pump has 5 diaphrams and I'm wondering if a crack or leak has occurred and it won't pressure up? If not that, then maybe the micro- processor is defective? Any ideas or experience here? Thanks
  • ScottG's avatar
    ScottG
    Nomad
    Jul 09, 2013
    The processor and limit switch are fine or it would run until it hydraulics and stalls. It probably sucked up a small piece of debris which is now stuck in the diaphragm (there's only one diaphragm assembly). When it does this it leaks pressure internally so it never builds enough pressure to shut down.
    Take the head apart and rinse the components off with water. Then reassemble and test - I'm betting all will be fine. (This has happened to me a couple of times.)
  • MSGTRETIREDCSP's avatar
    MSGTRETIREDCSP
    Explorer
    Jul 09, 2013
    ScottG wrote:
    The processor and limit switch are fine or it would run until it hydraulics and stalls. It probably sucked up a small piece of debris which is now stuck in the diaphragm (there's only one diaphragm assembly). When it does this it leaks pressure internally so it never builds enough pressure to shut down.
    Take the head apart and rinse the components off with water. Then reassemble and test - I'm betting all will be fine. (This has happened to me a couple of times.)



    Great. Thanks for the advice! I'm leaving for home in a couple of days. I'll check that and get back with you. Thanks again.
  • ScottG's avatar
    ScottG
    Nomad
    Jul 09, 2013
    VoodooMedicineMan wrote:
    This should answer your question

    Sureflow pump


    That post was for a pump that wouldn't run. The OP has the exact opposite problem.
  • MEXICOWANDERER's avatar
    MEXICOWANDERER
    Explorer
    Jul 09, 2013
    A million dollar pump will malfunction as fast and as thoroughly as a three dollar aquarium pump if it gets foreign debris in it.
  • MSGTRETIREDCSP's avatar
    MSGTRETIREDCSP
    Explorer
    Jul 09, 2013
    Hey guys, thanks for all your responses. I'll try what ScottG suggested and see if that works. Will get back and let you know. Thanks again.
  • greenrvgreen's avatar
    greenrvgreen
    Explorer
    Jul 10, 2013
    The Shurflo 5.7 has been discontinued because of premature deaths that start just like yours is. I bought one pump and had three warrantee replacements (four pumps total), and the average lifespan was six months.

    Shurflo started migrating 5.7 owners to the Revolution 4.0, which is a great great pump. The one I got has lasted well over a year with narry a hiccup. This pump is MORE responsive and will seem faster is every way, unless you're trying to fill a bathtub. That 5.7 (when it worked) had one heck of a top end.
  • djousma's avatar
    djousma
    Explorer
    Jul 10, 2013
    Got a 5.7 in my trailer that is 8 years old. Only thing I did two years ago was to replace the diaphragm. Hope the Revolution is just as nice as this pump. I like the variable speed, and boy is it quiet. no more of the annoying on/off cycling.

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