Originally Posted by NavigatorC130A
First off - I love the mod. We are new owners of a 2013 unit identical to yours. I have a hard time understanding why FR didn't do this in the first place.
Anyways - what an I missing? What is the reason for having 2 valves in the line from the kitchen gray water tank?? cable valve and reused valve?? Why not just have the cable valve?
Originally I was just going to reuse the existing valve where I now have it, near the tee, but I was concerned about having the weight/pressure of water in the new pipe while traveling.
I then considered just adding the new cable release valve to avoid that weight, but was concerned that if there wasn't a valve near the tee that the black tank water might backwash into the new pipe and sit there (if not ready to flush the kitchen tank immediately after the black tank).
Since I had the old valve ready to use, and only needed to add a couple of flange connectors, I decided to do both and prevent both the weight of water in the pipe while traveling, and prevent any backwash.
Pulling two handles to dump really isn't any inconvenience.
You could certainly do without the reused valve, but having two sets of flange fittings made it easier to do final assembly too.