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From: Lawrence Zeitlin (no email)
Date: Thu Nov 03 2005 - 09:11:12 EST
<<
Why are check valves a no-no?
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I'm not real sure, but I assume that a bilge pump being a VERY important
system, a check valve puts a restriction in the output of the pump. At best,
it restricts the flow, at worst, it could clog and shut the flow off
completely.>>
Worse than that. A check valve stuck in the open position could sink your boat. Many boats have the bilge pump outlet just above the water line. If the sump pump automatic switch failed, a not uncommon occurance, and the check valve was stuck open, a water leak could lower the boat until the bilge pump opening was below the water line. In that case water could enter the line and flow into the bilge. This could be prevented with a rising loop in the bilge pump hose but that precaution is not always taken.
Larry Z
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