The only problem with a check valve is that it reduces the flow rate. If you plan to use a check valve - as many of us, including me, do - just adjust your pump size accordingly.
Same goes for how big a column of water you're pushing (ie: hose diameter) Same goes for how high you're pushing that column. (ie: the higher the loop, the higher the column - And btw, you definitely DO want a loop) Same goes for the gauge of wire and length of wiring run to your pump. (Lower voltage = less flow) All of these impact flow rate. So your 2000GPH pump is actually pumping a lot less than that.... Again, not a huge problem - as long as you factor all these things into your de-watering strategy. Nigel Calder does a really good analysis of these factors in his mechanical and electrical book. Cheers Colin Btw - on Bojangles, the bilge pumps discharge well below waterline. I'm not super happy about that, but that's the way the boat was made and it'd be a major plumbing project to make it work a different way. Touch wood - this has always worked well for me. On 8/12/13, Josh Muckley <muckl...@gmail.com> wrote: > I must be messing up cause I have a check valve. Without it, all the water > that is pushed into the hose above the pump drains right back into the sump > once the pump turns off. With an auto sensing pump it would pump all the > time. > > I did up size the discharge hose and check valve so that they would he > harder to clog. > > Josh > > -- > When privacy matters. > http://www.secure-my-email.com > On Aug 12, 2013 9:15 PM, "Steven Winks" <swi...@cogeco.ca> wrote: > >> ** >> Hi. I have a 34+ and had an unusual thing happen this morning while at >> anchor. I woke to the sound of my electric bilge pump cycling on and off. >> The bilge was full of water. I turned the pump on to drain the bilge and >> it >> filled up again once the switch was selected to off. I had the same >> result >> with the manual pump. When I removed the manual bilge pump hose from the >> bilge and then turned on the electric pump again, the bilge stayed dry, >> so >> the water must have syphoned in via the manual pump discharge. The >> discharge on this boat lies only a few inches above the waterline, but >> with >> any weight aft, it is below the water. Has anyone else experienced this? >> I >> understand check valves are not recommended. Thanks for any advice. >> >> _______________________________________________ >> This List is provided by the C&C Photo Album >> http://www.cncphotoalbum.com >> CnC-List@cnc-list.com >> >> > -- Sent from my mobile device _______________________________________________ This List is provided by the C&C Photo Album http://www.cncphotoalbum.com CnC-List@cnc-list.com
