Seems a common problem, I get this on my 35-3. My solution was to add a
ball valve just under the sink drain, easily accessible in the head. I
know the more "seaman" like solution is to shut off the seacock, but to
be honest I do not. If someone is using the sink in the head they open
the valve to drain the sink.
Graham Collins
Secret Plans
C&C 35-III #11
On 2015-02-20 7:32 PM, mike amirault via CnC-List wrote:
On a C&C 33 mkii, has anyone experienced salt (or lake) water filling
up the sink in the head when heeled over hard on a stbd tack? Mine was
filling up and overflowing unless the sink plug was in or the drain
cock closed. I suppose the proper thing for a seaman to do would be to
close the drain cock but this can be inconvenient when cruising. I
installed a check valve and this worked but it is not of marine
quality and is corroding. I don't think a vented loop will work on a
gravity fed drain. Any other solutions?
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