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Conference unifix::sailing

Title:	SAILING
Notice:	Please read Note 2.* before participating in this conference
Moderator:	UNIFIX::BERENS

Created:	Wed Jul 01 1992
Last Modified:	Mon Jun 02 1997
Last Successful Update:	Fri Jun 06 1997
Number of topics:	2299
Total number of notes:	20724

1463.0. "Bilge pump back-flow problem" by MAIL::MCLAUGHLIN () Sun Mar 25 1990 18:38

    I just installed an automatic bildge pump and seem to have a problem. 
    Has anyone else encountered this?  Have I done something wrong in
    design of the installation?  Suggestions?
    
    My pump is installed in the keel sump, about 3 feet below the water
    line.  To get the outlet high enough, the total "lift" is about 5-6
    feet.  The problem is that when the float switch turns off after the
    pump empties the sump, the water in the 5' of hose runs back into the 
    bilge, which is enough to turn the pump back on, and it will continuously 
    cycle.  (The pump, a  Rule 2000, has no problem with the 6 foot lift.)  
    I installed the (Rule Super Switch) float switch approx. on the same level 
    as the pump intake.
    
    How have others solved this problem?
    
    The only solution that jumps to my mind is to install a 1-way valve
    just "above" the pump.  Unfortunately my catalogs don't seem to list one 
    with a 1 1/8" ID, which is the size of the pump outlet and hose.
    
    Comments?

T.R	Title	User	Personal Name	Date	Lines
1463.1		MSCSSE::BERENS	Alan Berens	`Fri Mar 30 1990 18:53`	1
	See notes 275.4 and 275.7 for some suggestions.