Pearson Boats - Common Systems > Plumbing and Galley Systems

Holding tank vent

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Scott:
I have converted the starboard water tank to a holding tank and was wondering if anyone could tell where the existing vent goes to, and also some ideas with regard to venting the now holding tank to the exterior of the boat. Thanks, Scott

Scott:
Is there anybody that can tell me where the vent to their holding tank exits their boat ? Mine did not have a holding tank so I would like to know where best to have the vent exit to the exterior before I go to cutting a hole in the cabin top or topsides. This newbie just wants to be sure before making that leap !

Dolce_Vita:
Ours exits through the hull, on the starboard side, just below the toe rail and ahead of the chainplates.

Last Resort:
my existing tank in the V-berth area vented out behind the Head cupboard. I wanted to add a 2nd one to vent in and produce better air flow with one taking air in and 1 taking it back out, so I just got the right size hole drill and went through the hull beside the original one. No issues.  FYI, the bigger you can go, the better. I ended up with a 5/8" hose for the 2nd one, but still have all the parts for a 1" that I had planned to go with, but changed my mind :)

Dolce_Vita:
The more venting the better.  Its the anaerobic bacterial processes that produce the bad odors, so the more air (and thus more aerobic decay) the less odor.

A good place to put a second vent (though harder to route) is on the opposite side of the boat from the first one. This provides more air circulation by taking advantage of the pressure differential between the two sides of the boat whenever the wind isn't exactly head-on or stern-on.

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