View Single Post
Old 08-09-2016, 10:20 PM   #7
cappy208
Guru
 
cappy208's Avatar
 
City: Cape Cod
Vessel Name: Slip Aweigh
Vessel Model: Prairie 29
Join Date: Oct 2013
Posts: 1,219
Add a raised loop up in the space outboard of the water pump, up where the purple hose is. No need for a vented loop. If the boat sinks 'that far' a vented loop is the least of your needs. Just raise the hose up so the top is a foot above the thru hull.

like this:
One of the problems with these bilge pumps installed like this is the hose drains back into the boat after it shuts off. Nothing like wanting a dry bilge then having the hose contents siphon back into the boat. The solution is to make a raised loop as close to the pump, so the amount of water that flows back into bilge is minimized. In your case I would consider installing the hose straight up from the pump on the FWD bulkhead, up to a loop and running it down and over to the thru hull to make as short a run to the loop, and have longest run after loop to thru hull. Make sure you have a constant downward slope in the side from the loop to the thru hull that way it drains completely and doesn't let algae grow in the hose to clog it up.

I wouldn't depend on a thru hull mounted checkvalve to stop water ingress. Checkvalves get gunked up with bilge scum. (although your bilges look pristine) Freely moving parts and seawater don't last long.
cappy208 is offline   Reply With Quote