[alberg30] bilge plumbin'

[alberg30]

I have plumbed my 2000gph electric bilge pump into one of the hoses for
the gunal scuppers. The gunal scuppers on #499 are plumbed into the
hoses and thru hulls for the cockpit scuppers, directly aft of the
engine--under the cockpit. They can be found very high in the cockpit
lockers, port and starboard. The hose for the bilge pump has a loop well
above the water line and the thru hulls for the cockpit scuppers. It has
worked well for some time. The disadvantage is that you cannot see
what's being pumped overboard. It just goes away. Its like pumping bilge
water into the cockpit or gunal and then it just drains out of the
boat.The advantage is that the hose run from the bilge to the gunal
hoses is a relatively short one--maybe 5-6 feet. It can be easily
mounted along the port galley bulkhead--aft side, inside the port
lazarette. As you probably know, the length of hose and diameter greatly
affect the rate of output and the work of the pump.

My understanding is that you wouldn't need a check valve if you have an
anti-siphon loop. I also have read  that no matter where installed in a
bilge pump system/scupper system you do not want a check valve because
they may clog and thus prevent pumping out.

I would prefer to run the bilge pump hose well aft to the Thru hull for
the manual bilge pump, in the very aft lazarette--opposite the engine
exhaust thru hull. But the distance is pretty far for the 3/4" hose that
the electric bilge pump takes. Also the manual bilge pump hoses are 1
1/2" I think. You'd need an adapter T fitting to get everything
connected and about 12 feet of hose  for the electric bilge pump.

I am in the process of adding a low profile 350 gph into the system.
This will suck up the remaining water that the 2000gh pump can't force
out. It will be plumped with smaller hose, with its own loop, to the
3/4" hose for the bigger pump, somewhere along the output line. Of
course everything is on a manual/automatic float switch.

With seven Thru hulls in the A30 already, I am reluctant to add any
more.

My two cents;

Joe #499
"One Less Traveled"



----- Original Message -----
From: Anne <annes at chesapeake.net>
To: <alberg30 at egroups.com>
Sent: Saturday, May 20, 2000 10:52 PM
Subject: [alberg30] bilge plumbin'


> We've looked through the maintenance manual and there is little
information
> regarding how to plumb the bilge pump. We plan on installing one
low-volume
> automatic pump and one high-volume on-demand pump. Where is the
optimum
> place to plumb the bilge outflow? We know that the bilge output has to
be
> above the waterline. The only convenient access points are the cockpit
> drains, however they aren't very far above the waterline (as is the
galley
> sink drain). We would like to avoid plumbing to the engine water
exhaust.
> Should we add another thru hull above the waterline? Where is the best
> location...transom?... adjacent cockpit locker? Should the outputs of
the
> two bilge pumps be isolated to separate thru hulls.
>
> Any suggestions are appreciated.
>
> Thanks
> Anne and Brent
> Macinda
> #159
>
>
>
>
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