Next message: Hugh Barrass: "Re: lv-ab: Re: Bilge pumps and left overs"
Andina,
Refresh what's left of my memory if you would. What's the downside of a
checkvalve used in the situation we're describing? The possibility that a
small piece of schmutz (a highly technical term <grin>) might lodge in the
valve and keep it stuck open? It seems to me that the only result of that
would be you'd be back at square one dealing with the backflow.
Steve Weinstein
Hydro-Therapy
1981 Cherubini Hunter 33
Sailing out of Oyster Bay, N.Y.
----- Original Message -----
From: <>
To: <>
Sent: Monday, September 08, 2003 10:25 AM
Subject: Re: lv-ab: Re: Bilge pumps and left overs
> > I know this was discussed before, but I can't remember the issue. It
> seems
> > to me that if the float switch is properly placed there is no need to
> > continue to run after it trips. My bilge has about 2" of water in it
when
> > the pump shuts off. Much of this is water that leaks back down from the
> > pump. If the pump were to run another 60 seconds it would be running
> > dry. What am I missing?
>
> The switch must have at least an inch or more of "floating" at the point
> where it turns off otherwise the turn off would be unreliable. This means
> leaving a couple of inches of water sitting in the bilge although the pump
> often has the capability of pumping down to 1/4" or less. Many would like
> to remove this residual water and by running the pump until it sucks air
so
> you eliminate most of this.
>
> As pointed out, once it turns off there is not much you can do about the
> flush back without resorting to check valves, and their associated
> maintenance and reliability worries.
>
> Andina Foster,
>
>
>
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