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 Catalina/Capri 25/250 Sailor's Forums
 General Sailing Forum
 Gray Water Tank,-Does it need a vent?		  New Topic  Topic Locked
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existentialsailor
Master Marine Consultant

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USA
1180 Posts
Initially Posted - 04/04/2006 :  20:49:23  Show Profile
I've removed my thru hull for my sink and am installing a gray water tank, does such a tank need a vent like the head tank?

Thanks.
Rick
Edited by - existentialsailor on 04/05/2006 04:43:06

takokichi
Captain

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USA
321 Posts
Response Posted - 04/04/2006 :  21:04:27  Show Profile
Rick - If you haven't closed the hole up, I'd put a thru hull and seacock in and skip the tank. Why do you prefer the tank route?

If you do put in a tank, you need vent. Otherwise as the water level in the tank rises, the tank will become pressurized and will not accept more water.
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existentialsailor
Master Marine Consultant

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USA
1180 Posts
Response Posted - 04/05/2006 :  04:45:44  Show Profile
I plan to visit some no discharge areas in the future and since the thru hull was weeping, I thought this was the opportunity to make the change. Thanks for the answer, I wasn't sure if the drain acted as its own vent or not.
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takokichi
Captain

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USA
321 Posts
Response Posted - 04/05/2006 :  08:01:04  Show Profile
If you need to go no discharge in the future, you could just close the seacock and stick the hose in a gallon milk jug. When Casco Bay goes "no discharge" it will apply to black water only, not gray water.
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Notice: The advice given on this site is based upon individual or quoted experience, yours may differ.
The Officers, Staff and members of this site only provide information based upon the concept that anyone utilizing this information does so at their own risk and holds harmless all contributors to this site.