Wal, if you are gone any amount of time when they fail you have lost the
boat anyway - any half decently sized bilge pump will kill the battery.
Let's assume a Whale 1000 gallon / hr pump, this will pull 4 amps. The
1000 gallons/hr rating is ideal, like mileage ratings on cars, so in
real life assuming 5 feet of head you will get maybe half that.
A 1" hose off a fitting at 2 feet below waterline will flood at 12.7 gpm
= 762 gallons per hour. Your pump won't keep up with that.
So back to the Defender site, what's a 2000 gph pump draw? The Rule
pump draws 8.4 amps. So now your boat is safe, at a cost of 8.4 amp
hours - how many days does that keep your boat afloat? What if it is a
seacock that fails (higher flooding rate), or a bigger fitting?
(technical reference: Calder, Boatowner's Mechanical And Electrical
Manual 3rd edition, "flooding rates" p 581)
How many on here have a 2000 gph automatic bilge pumps? I consider
automatic bilge pumps to be suitable for nuisance flooding (e.g. rain
down the mast), and one would buy me a bit of time in a crisis, but to
rely on one for long term unattended protection is unrealistic. Far
better to check and eliminate the risks you mention.
Graham Collins
Secret Plans
C&C 35-III #11
On 2014-11-03 1:00 PM, Wally Bryant via CnC-List wrote:
Not crazy, but how old are your through hulls, sea cocks and hoses?
Are your hoses held up with seizing wire so if the sink connections
crack the hose won't fall down below the waterline? Do you have any
red brass nipples connecting sea cocks to bronze T's to share hose
fittings? That's the stuff I worry about, because I might be gone if
they fail.
Speaking of boats sinking at the dock, we had another one here the
other day. The locals were trying to raise it with empty 55 gallon
drums -- except the drums weren't empty. The smell of solvent was
overwhelming from 100 yards away, and I looked over to see them
dumping the remaining contents into the marina water. Great. I walked
over to complain, but they couldn't speak English and insisted it was
just aqua. The drums were covered with warnings from 'flammable' to
'do not inhale fumes.' Funny how they were doing it on a national
holiday, when the port captain was gone and the marina security was on
a skeleton staff.
Wal
you wrote:
I don’t have an electric automatic bilge pump. I just have my Whale
gusher. I have never found much water in the boat even after extended
time on the mooring. Usually just a short turn (maybe 10 pumps) at
the pump handle empties it out. Am I crazy?
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