Join Date: Jan 2003
Location: Maine Coast
Thanked 287 Times in 220 Posts
Rep Power: 17
Re: Bilge pump non return valve.
Just to clarify ... we only talking electric pumps here ?
Our manual emergency pump (Henderson type) has been unused for many years and I suspect that its rubber flappy thing has perished. Yes there is a seacock on the through hull.
I'm about ready to rebuild the thing but what of adding a check valve into the line as back up ? Is this OK ? Is this stupid ? Is this simply not necessary ?
Those Henderson pumps can suck Bigfoots turds through a straw. No issues with a check valve on those but do use an intake screen on the pick up..
Again the real concern is with a "Rule" type centrifugal pump and the use of a check valve. These pumps have very little ability to deal with restricted or increased head pressure before they just sit there and make tiny bubbles and kill your bank..
-Maine Sail / CS-36T
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