A problem I have seen is that the quick disconnect fittings are made in two varieties, low pressure and high pressure. I bought one from Camping World that was labelled and the valve was marked low pressure but it was in fact a high pressure fitting. If I remember correctly it mated with the low pressure fitting on my grill hose but the male fitting on the hose would not actuate the shutoff built into the female fitting I bought. I bought another fitting from a different source and it worked.
"You cannot reason someone out of a position they have not been reasoned into"
Al, K5TAN and Missy, N4RGO
2002 Classic 30 Slideout
2001 Safari 25 RB Twin (Gone, but not forgotten)
2013 Dodge 2500 Laramie 4x4 Megacab Cummins
WBCCI 1322, TAC FL-39, AIR 82265