Originally Posted by Dockhead
Clogging is a huge problem which most people don't expect.
No matter how dry and clean your bilges are, all kinds of carp will appear in the bilge water, as soon as the level gets above normal. It's amazing how much comes out. It's because s*** famously rolls downhill, so all kinds of debris ends up in the bilge and you will never see and clean it all, and lots of it ends up in places too high to be washed out in normal circumstances.
I bet plenty of boats have been sunk by clogged bilge pumps.
Cockpit discharge no good for my boat, as my boat has terrible cockpit drains. A rare design flaw in the work of a designer
known for attention to detail (Bill Dixon), but he screwed the pooch on the cockpit drains. I've had bathtubs which drain better than my cockpit.
Your pumps are huge, way 2 big for almost any cockpit to handle.
I am with you totally on the "No matter how dry and clean your bilges are, all kinds of carp will appear in the bilge water, as soon as the level gets above normal. "
I appreciate the effort you have done and explained here, something of great interest to me as just sold my nightmare of a boat, and at the same time fully retired and am looking to make one more long passage
with a ready made boat so will definitely incorporate some of your ideas.
I once tried hard to work around that on one boat, a custom 33' I had, a total "eggshell" construction, all sofas, nav table sides, galley
sides, everything was laminated to the hull
, each other, bulkheads or the deck
, there was not one opening to the floors or bilge apart from a 10 mm internal d drain tube from every one of the numerous "boxes" into the "bilge".
The spaces between 3x3 inch foam filled frames where sprayed with PU sanded and glassed over, basically the only interior parts
(apart from fittings) that had screws or bolts where hinges for watertight doors and the chart table top.
The floor was also sprayed in and glassed leaving only the keel
stump as a bilge and anything wanting to get into the bilge had only one way to get there, through 3 holes in the locked in place bilge "cover" only the length of the keel
and about 2" wide, still stuff was found there, what could get there through a 1" drain holes, mainly dry dog food
and dirt, it only housed the bilge pumps and a fisherman's anchor
In case of a bigger breach the actual "bilge" would have been in the interior
to the height of the settee sides calculated to be above WL even when filled ie float in calm or even a small swell if locker tops stayed closed, deck
was also glassed in and designed to hold the weight of the boat as it had a quite some flotation incorporated into it.