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  1. #1
    Site Sponsor
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    Aug 2019
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    NW Montana
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    twin black lines and air valve in bathroom sink cabinet

    What are these? What does this air vent/ air valve do?

    Mine had a leak and put a puddle in the bathroom cabinet and some ran down into the basement.

    I thought that it might be the fresh water tank burp valve... but why, there is an overflow line?

    How could it get water in the lines?
    2015 Ford F350 6.7L TurboDiesel, Crew Cab, short bed SRW, 4x4, Lariat
    2021 Reflection 5th Wheel 337
    Pullrite Superglide hitch, TST507 TPMS

  2. #2
    Site Sponsor ShadyCamper's Avatar
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    May 2018
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    Giles County, TN
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    It is the black tank flush. As I understand it, RIVA requires that the line have a back-flow preventor/anti-siphon system. What you are calling an air vent, doesn't actually vent any air. It has two different valves that only allow water to flow toward the black tank.

    I had a leak in mine this fall, it was caused by stink bugs getting into the top of the anti-siphon valve and preventing it from sealing properly. Easy fix, once I figured out the problem. Stink bugs have been very bad this fall in Tennessee.
    Mike, Linda, and Shady (terrier mix rescue)

    Reflection 150 230 RL with free standing dinette (swapped location of the dinette and the recliners)
    2020 GMC 3500 Denali
    B&W Companion Hitch and Turning Point Pin Box locked out

  3. #3
    Big Traveler Wicked ace's Avatar
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    Sep 2018
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    Quote Originally Posted by ShadyCamper View Post
    Stink bugs have been very bad this fall in Tennessee.
    Late to the party, I know. I was at Roan Mountain Late September and I had them crawling all over my trailer. I think I imported a new species to co-mingle with the local ones here. Between the two invading I had to fog the interior to get rid of them.
    2018 F150 XLT 301a, Screw, 4x4, HDPP, Max tow, Andersen Ultimate w/ Curt Double Lock hitch.
    2019 Grand Design Reflection 150 series 260RD.... SOLD!!!!.

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