Wow, this thread had me all paranoid that mine was plumbed in this unorthodox way, so I had to go out and look at it at 11:05pm...
. Fortunately, mine is plumbed correctly--I can open the gray without having to open the black, and vice-versa. Now I just have to decide if I want to replace my valves with electric or cable valves, as mine (esp the gray) are just way too far under the rig to get to easily.
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2015 XLR Hyperlite 30HFS5 (mods being performed regularly)
2009 Salem LA 292fkds (gone)
Nights- ('12)23 ('13)23 ('14)15 ('15)31 ('16)27 ('17) 20 (‘18)21 (‘19)23
2019 Honda CRV (camping support vehicle)
2014 Harley Davidson FLHX (XLR cargo)
2011 Ram 2500 CC 4X4 CTD, B&W Companion (toy hauler hauler)