does anyone else have this problem ... we have a 36RH and the icebox/refrigerator drains via a through hull, however, the icebox lowest point seems to be below the waterline. hence when we try and drain the icebox and open the through hull valve water comes in from the through hull. Does anyone know how to solve this or are we just doing something incorrectly to drain the ice box?
Our '88 boat had an ice box drain hose that was open to the bilge. Very inefficient.
First thing we did was put a plastic ball valve on the hose end so that a) the cold air would stay inside the ice box, and b) we could drag that valve-n-hose out from under the galley counter and drain out the melt water into a sauce pan regularly and empty it into the sink.
Later I installed a refridgeration system and that valve has not been opened since.
Anyhow, I am not aware of any presumed advantage or reason to have another thruhull opening just for that purpose.
FWIW: On our prior boat the ice box drain hose went to a small manifold where we could choose that "source" and use the foot pump to pump it out into the galley sink.
Just some food (melt water?) for thought.
LB