I think you might be one or two emails behind on this, Norm <grins>. My concept was something powerful enough to push enough air through the hose to completely eliminate any residual water in the hose which could backflow into the sump or bilge. In a perfect world, the float switch would come on and if you were standing outside looking at the above-water thru-hull, you'd see the water come out and then a big "puff" of nothing-but-air.
Steve Steve Weinstein S/V CAPTIVA 1997 Hunter 376, Hull #376 Sailing out of Oyster Bay, NY All outgoing mail protected by VIPRE A/V -----Original Message----- From: banders...@earthlink.net Sent: Friday, April 13, 2012 11:38 PM To: liveaboard@liveaboardonline.com Subject: Re: [Liveaboard] How often do you clean your shower sump... There are lots of dry-run pumps available, most every diaphragm pump. I have one for my domestic water that has run dry for hours on occasion without harm. It will push air if given an open discharge, as mine does every time I suck a tank dry and have to switch tanks. Norm S/V Bandersnatch Lying Julington Creek FL I wonder whether anyone makes a run-dry bilge pump which can continue to run and push air through the hose. Steve W _______________________________________________ Liveaboard mailing list Liveaboard@liveaboardonline.com To adjust your membership settings over the web http://liveaboardonline.com/mailman/listinfo/liveaboard To subscribe send an email to liveaboard-j...@liveaboardonline.com To unsubscribe send an email to liveaboard-le...@liveaboardonline.com The archives are at http://www.liveaboardonline.com/pipermail/liveaboard/ To search the archives http://www.mail-archive.com/liveaboard@liveaboardnow.org The Mailman Users Guide can be found here http://www.gnu.org/software/mailman/mailman-member/index.html _______________________________________________ Liveaboard mailing list Liveaboard@liveaboardonline.com To adjust your membership settings over the web http://liveaboardonline.com/mailman/listinfo/liveaboard To subscribe send an email to liveaboard-j...@liveaboardonline.com To unsubscribe send an email to liveaboard-le...@liveaboardonline.com The archives are at http://www.liveaboardonline.com/pipermail/liveaboard/ To search the archives http://www.mail-archive.com/liveaboard@liveaboardnow.org The Mailman Users Guide can be found here http://www.gnu.org/software/mailman/mailman-member/index.html
