Solely because the pic I took - and attached - wasn't! - I'm gonna try again! I put these valves - pictured, I hope!- on each of the external drains lines. Certainly makes that job a dry one. I purchased the valves at Ace Hardware.
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Alan, Kathy & Cooper the camping cat
2014 Cedar Creek, 36CKTS
2013 GMC 2500 Denali
Duramax/Allison
Full timers since 5/30/2013