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Old 09-16-2015, 04:46 PM   #1
Join Date: Sep 2015
Location: randolph
Posts: 62
anti syphon airlock device

have a 165 , with single small sink, p trap underneath, grey water tank vent up through the roof. bad smells coming up through the air lock device under the cabinet, do I really need it with the roof vent ? thanks (in the process of rebuilding right now will eventually completely clean the tank )

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Old 09-16-2015, 04:58 PM   #2
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Join Date: May 2012
Location: Minnesota
Posts: 3,177
That's a really good question, i'm not sure. It is code for RV's. They are not like in stick framed homes. I think they stick open for everyone once in a while.

There are two versions, the ones used in rv's are the cheaper ones.

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Old 09-16-2015, 06:35 PM   #3
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Tap it with a screw driver or take it off and clean the valve. Not an e item to replace.
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Old 09-16-2015, 06:46 PM   #4
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Location: Irondale
Posts: 25
I would replace it, the spring could be weak. You can perchase one at Lowe's, they're cheap. Just unscrew the old one and screw the new one on. The roof vent is needed when draining the tank.
Water, water, every where,
And all the boards did shrink;
Water, water, every where,
Nor any drop to drink.
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