View Poll Results: TO VENT OR NOT TO VENT?
YES - vent the gray tank through the roof 18 94.74%
NO - just keep the tank clean and it will be fine 1 5.26%
Voters: 19. You may not vote on this poll

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Old 10-30-2015, 07:43 AM   #15
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1955 22' Flying Cloud
1964 17' Bambi II
Clear Lake Shores , Texas
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When I added gray and black tanks to my 55 FC I tied the vents into the existing sink vent that runs through the roof.
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Old 10-30-2015, 09:33 AM   #16
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Oswego , Illinois
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Originally Posted by cwf View Post
If you are close to another "vent" going thru the roof, tie together up above the level of the sink.

Another less desirable option would be to vent from top of tank thru the floor... But that can cause more critter issues.
This is how mine is plumbed from the factory. Gray vent tee'd to the black vent with a single common vent through the roof.


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