Marshall Excelsior ME422P Extend-A-Flow Propane Tee Adapter Marshall Excelsior Propane Adapter Tee Model ME422P The ME422P camping appliance fitting allows towable RV or cottage owners the ability to connect two high pressure LP gas appliances to a single LP gas cylinder source Connection port for powering camp stoves, lanterns and table top grills, portable heaters and other LP appliances directly from the fuel supply of the RV QCC1 x Retro-Q x 1 Inch 20M x 1/4 inch Inverted Flare