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Old 13-03-2019, 03:16   #1
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Join Date: Dec 2009
Location: Australia
Boat: building Roberts Mauritius 43ft
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Holding Tank Plumbing

I am about to start on the holding tank plumbing.

I have a deck outlet for discharge at the marina with a black nylon screw-in terminal (see photo)

The macerator empties the toilet bowl and discharges it into the holding tank (No "Y" valve). A manual bilge pump empties the holding tank.

My questions are:
  • What diameter tank vent tube?
  • Is there any objection to exiting the vent tube through the side of the yacht?
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Old 13-03-2019, 05:17   #2
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Re: Holding Tank Plumbing

See posts by Peggie Hall (PegHall here, HeadMistress on trawlerforum)...

Usually sanitation hoses for effluent are 1" and I think she recommends vent hoses be 1" minimum.

Venting out thru the hull, perhaps 6" below a rub rail, is quite common.

-Chris
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Old 13-03-2019, 05:32   #3
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Re: Holding Tank Plumbing

Quote:
Originally Posted by ranger42c View Post
See posts by Peggie Hall (PegHall here, HeadMistress on trawlerforum)...

Usually sanitation hoses for effluent are 1" and I think she recommends vent hoses be 1" minimum.

Venting out thru the hull, perhaps 6" below a rub rail, is quite common.

-Chris
Thanks Chris.

The hoses for the effluent are 1 in and I make the vent hose 1".
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