Peggie,

Trying to tell people to install vented loops is like trying to get them to
close seacocks when they leave the boat for extended periods. Ain't gonna
happen.

When you tell people they should close all the through hulls prior to
leaving they say that is not what they are for, or that would take to long,
or don't you trust your hoses, or I can't get too my through hulls,,,,and
that is why most boats sink at the dock.

You should see the looks I get from the yard when I tell them the ignition
key is hanging on the closed raw water engine intake and they will need to
open the intake when getting the key to start the engine.

B

"Peggie Hall" wrote in message
...
Gary wrote:
Yup, my cousins bilge pump started syphoning and sank his boat.

I don' TEEENK that's what happened...for a couple of reasons: bilge pumps
don't bring water INTO the boat, they remove water FROM the boat...and the
thru-hulls for bilge pumps are above the waterline. So unless there was
already enough water in the boat to put the bilge pump thru-hull under
water, there's no way that a siphon can start in a bilge pump line.

The water that sank your cousin's boat had to be coming in somewhere
else...and either the bilge pumps clogged and failed, or they kept pumping
till they drained the batteries and died...allowing the boat to fill up
and sink. Or, the water was coming in faster than the bilge pumps could
keep up with it. Or any combination/all of the above.

--
Peggie
----------
Peggie Hall
Specializing in marine sanitation since 1987
Author "Get Rid of Boat Odors - A Guide To Marine Sanitation Systems and
Other Sources of Aggravation and Odor"
http://www.seaworthy.com/store/custo...0&cat=6&page=1
http://shop.sailboatowners.com/books...ku=90&cat=1304