p22sigman…
I have one that does exactly the same thing. Works fine with the grill, but won't work with the Pup at all. It doesn't matter how slowly I open the valve, I can hear the safety click in the tank valve. When I have it hooked to the grill, it doesn't matter how fast I open it, it works fine.
Seems like I hear that click when opening the valve all the time on all tanks that work or not on RV, but can't say for sure. Is that the safety something closing in the tank? I thought only safety shut-off in the tank was the level dongle thing (if it is tipped sideways will turn off).
Most of my tanks now are ones that get traded off at the stores (not always convenient to get em filled) so although this tank came off old camper where everything worked, I cant say for sure that I ever used this tank as it was paired with another…
Now that it all works I left tank open a couple of days and got a heavy propane smell in camper. I guess the propane alarm does not work.