Welcome to the forum! The back flow preventer is behind the access panel in the "super pantry" area... Lower right. I've heard some of the valves they have installed are bad. The water line from the outside valve should come into the valve from the bottom and exit towards the black rank from its side.
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Hyper Lite was sold
2017 F-250 4x4 6.2L Gas
I can't fix everything, but I can make it so nobody else can
Mine wasn't working either, so I first took the backflow preventer valve apart and thought the ball was jammed in too tight. putting it back together did not solve it, so I got under the camper and followed the line. The factory monkeys zip tied the hose at 180 degrees - closing it off completely. I cut the zip tie and retied it trying to pull the hose straight. The kink didn't want to come out. I squeezed it with pliers and held it for 5 minutes, then immediately zip tied where it was kinked - finger tight only. That did it. I can now use my black tank flush and it works SO GOOD.
Tightening zip ties isn't the operation to showcase your herculean strength. It looks like "he" zipped it (albeit too snug) too far down the run; then pulled it back sharply... Still showing off arm strength; even the blue hose is flattened. Maybe a little more training us in order.
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Hyper Lite was sold
2017 F-250 4x4 6.2L Gas
I can't fix everything, but I can make it so nobody else can
I would like someone to explain to this dummy why the need for the valve in the first place with a back flow valve on the inlet hose connection like I have. Just don't understand the need or function of having 2 back flow preventers.
You're right OC, you don't need two of them. I only have the one pictured, which is a couple feet of hose inside the trailer, then it goes through the floor, and towards the front before turning around and heading for the black tank.
I would like someone to explain to this dummy why the need for the valve in the first place with a back flow valve on the inlet hose connection like I have. Just don't understand the need or function of having 2 back flow preventers.
I've read a lot about your 2 BF preventers on this forum and think your unit is possibly a one of a kind. I have a MH and have just one BF preventer which is about 5 feet above the black tank inlet and the input port for the flushing water. And yes when I disconnect the inlet port there is residual water that drains back out that port but it is from the input side of the BF preventer (the black tank side is isolated by the BF plunger). My coach manual points this out. Yes, two BF preventers are certainly ridiculous but seems you are among the very few that might have this arrangement. Go figure.
Linear Mode
