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Old 10-20-2017, 11:20 AM   #5
Carl n Susan
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Join Date: Oct 2005
Location: Carmichael - CA
Posts: 7,366
M.O.C. #4831
As written before, there are hundreds of posts about the black tank anti-siphon valve. I see you have a 2010 3400RL, Here is a post from a 2009 3400RL owner documenting his adventures finding and replacing the valve. The pictures provided are what you really want to see.
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Carl (n Susan)
There is more to life than fuel mileage.
2012 Montana 3700RL Big Sky Package towed by a 2015 Ford F350 6.7L PSD 4WD CC LWB

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