Need an explanation

[L-Seelig]

As a result of reading one of the threads, I was checking out this site recommended by a poster. www.marinesurvey.com/yacht/sinking.htm#ReverseNow this may be a dumb question but in the section on bilge pumps, the writer mentioned a "riser loop" on the discharge hose. Can someone explain how this is correctly done? I'm about to install a new bilge pump w/float switch. The previous owner just had a manual and apparently discharged over the side with the attached hose.Any help would be appreciated.Regards,Lysle

 

[Steve Dion]

What I "think" they are talking about....

is the thru hull fitting (usually nylon) has a 90 degree fitting on it that point up. You then fit your discharge hose on this fitting and secure the hose to itself (with a wire tie or such) or to a bulk head with a nylon strap. It essentially prevents water from just flowing down the hose and into the bilge. We also have the same arrangement on our fuel hose vent.

 

[Peggie Hall/Head Mistress]

It's just an arch in the bilge pump discharge hose

that's well above the water line. Of course, so should the bilge pump thru-hull be.