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Re: Fresh Water Pump Losing Prime

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  • Martin
    Our hose was 1/2 . Cheers, Martin
    Message 1 of 7 , Feb 6, 2013
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      Our hose was 1/2".
      Cheers,
      Martin

      --- In Sabresailboat@yahoogroups.com, "JohnF" wrote:
      >
      > Martin - Do you happen to remember the diameter of the hoses - 1/2" ? 5/8" ?
      >
      > --- In Sabresailboat@yahoogroups.com, "Martin" wrote:
      > >
      > > Barend,
      > > I used plastic ball valves, in convenient locations just before the pumps. Takes half an hour or less each. Should have done it when we bought the boat.
      > >
      > > Cheers,
      > > Martin
      > >
      > > --- In Sabresailboat@yahoogroups.com, "barend27" wrote:
      > > >
      > > > Thank you for the advice Martin. I have a 1989 S34 II and always struggle to get my water pump priming when switching tanks.
      > > >
      > > > I'll be spending $19 soon.
      > > >
      > > > Thanks again,
      > > > //Barend (Yen Shon, 1989 S34II #376)
      > > >
      > > > --- In Sabresailboat@yahoogroups.com, "Martin" wrote:
      > > > >
      > > > > On our 1987 S34II we have often had problems with the original Par diaphram water pump losing prime and running fast with no output. This happens because the supply line from the tank selector to the electric pump also is t'd into the Whale galley/head foot pumps. Over time the Whale pump's seals leak air into the supply line causing the electric pump to lose its prime.
      > > > >
      > > > > In the past we have solved this by pumping each foot pump to get the air out of the lines and then closing the valve at the end of the spigot. Howeever it can take many tries and much patience if the tanks are low. The starboard tank is particularly problematic because its route to the pump is two to three times as long as the route for the port tank.
      > > > >
      > > > > Today, having spent nearly an hour trying all the tricks to get the prime back I ended up installing two ball valves in the water supply lines before the foot pumps. With the valves closed the electric pump is very happy and provided much better output than previously.
      > > > >
      > > > > The other solution is to replace the leaky footpumps or rebuild them, but that route is expensive, and we never use the foot pumps except when trying to prime the electric pumps. Having the valves allows one to revert to using the foot pumps if needed.
      > > > > Best $19 spent on the boat so far.
      > > > >
      > > > > Cheers,
      > > > > Martin
      > > > >
      > > >
      > >
      >
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