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Old 12-13-2011, 02:16 PM   #5
JRTJH
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Join Date: Mar 2011
Location: Gaylord
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Ron, The spring valve you mention is designed to work in a liquid environment. I'd urge you to also assure it is "air tight" since what you're trying to keep out of the fresh water system is sewer gas as well as black waste fluid.
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