city water back flow valve leak

Our 08 HR came with a plastic plug on a tether for the water inlet connection. This plug was always in place when the hose was not hooked up. The plug assures that the back flow valve never leaks and also keeps dirt out of the water inlet when traveling or dry camping. Why would you not have the plug in place when not hooked up to city water?
Randy

rv2go wrote:
I use something like this.

I used the same thing except the brass ones after replacing a couple of the check valves. The check valves are still working, but now I have a way to shut the backflow off if needed and I'm not somewhere that replacing them is a timely solution.

I use something like this.

That would be a garden hose plug, not a pipe plug. Different threads.

Get a 3/4" PVC plug and screw it in city water connection....done

Those check valves are just a cheap plastic plunger with a ball point pen spring and an small o-ring. Junk----just like ones on water heaters.

Often what happens is someone tries to winterize this line once the system is already pumped up to pressure. Pushing on the tip inside the valve then releases pressurized water out the check valve, and the O-ring inside becomes unseated as it's meant to work in the other direction. When I replaced mine I just undid the screws and pulled it out, replaced the check valve with a new one. $10. or less.

Not sure on Winnebago, but on many Fleetwood it takes a new hatch assembly.
I got a standard check valve for 1/2 pipe and installed it in compartment below my hatch.