We really like our galley
sink drain pump w/vent setup and suggest that anyone who doesn't like getting seawater back up in their sink might like to install a similar one. Ours is electric
but manual would work as well.
Terra Nova, you seem incredibly judgemental. No reason for such here. Hope you're just having an off day.
We have an installation
that 99.999% of surveryors, engineers, and experienced cruisers would pronounce as a proper and safe bilge pump
installation--and you haven't been given sufficient information for the grand pronouncement that it is unsafe. Perhaps my description was sufficiently incomplete that a declaration by you that I've described something that YOU find unsafe might be more appropriate and spot on to describe your own thoughts on the matter.
And, the install is safe in a wide variety of sea states that folks generally encounter when ocean sailing. We also happen to have sailed in extremely rough/heavy weather
conditions more so than the average sailor and/or cruiser. And therein we find opportunities for large waves with a beam-on component to shove water into the bilge
exit (um, how often do YOU think a sailor purposely sails
with large beam-on waves? a bit unlikely isn't it?) and since the large beam-on waves in these situations are hitting all parts
of the boat and crashing onto deck
as well, there's not a sailor out there who'd really think that placing the exit higher on the side of the boat would help. No, it wouldn't have. From your other comments you seem to dislike check valves therefore what magic rabbit would you pull out of a hat to remedy the situation w/o a check valve or closing the thru-hull rendering the particular bilge
We have a bilge water monitoring system that tells us inches of water in forward and aft bilge sections so we can see what it's got from 1/2" on up. Given that, we're pretty in-tune to what sea states put water in the bilge and which do not. I personally dislike check valves of any sort in this application but there is little else (besides closing the seacock) that seems appropriate to this bilge pump installation. I have considered plumbing
the discharge into the cockpit
but that would be difficult (too far from pump to cockpit) to achieve.
Being very safety-conscious, we do have more bilge pumps than most (including the one in question we have 4 that are always on/available, 2 large capacity electric
ones in reserve (120VAC that would be used with the generator) and two large capacity manual ones at the ready.
I was hoping someone here would have a word of wisdom about check valves and bilge pumps--or have experience with another clever solution. The bronze swinging sort that works nicely in a down slope pipe seems like it might be just the thing. It's these small details of actually cruising that can be very frustrating -- the decision of follow the "rules" of ABYC which are usually well thought out or wing it with one's own solution that may NOT be so well thought out.
On the whole issue of telling people that their seacocks must be easily gotten to--I agree but even the easiest to access seacock can be almost impossible to get to and/or close in rough conditions. The larger the boat, the more likely this is to be true. So not having to get to the seacock at all is still the best solution.
Thanks to all for your comments on ABYC and check valves.