The Grill connect is a low pressure device DO NOT back feed propane into that fitting as the regulator will vent.
True story
My Class A would not fill
Turns out when he pulled the hose out of the cabinet to hook up to the tank he snagged the emergency shut off cable on the Pump system...
To fix. Shove ECO lever back to normal. Yup. really happned .
Took them a while to figure it out however and I found a lower cost propane supplier in the mean time.
Home was where I park it. but alas the.
2005 Damon Intruder 377 Alas declared a total loss
after a semi "nicked" it. Still have the radios
Kenwood TS-2000, ICOM ID-5100, ID-51A+2, ID-880 REF030C most times