propane regulators best seller! indicators show when reserve cylinder is low guerque provides easy changeover from empty to full cylinder double quick-connect "y" fitting lets you connect two low-pressure propane appliances to the quick-connect one male quick-connect fitting and two female quick- high capacity two stage ideal for running multiple high btu for use on single tank horizontal regulator mount to be used simultaneously propane fittings use to connect hose to regulator inlet propane hose assemblies best seller! connects a refillable propane cylinder to your rv hook up an auxiliary propane cylinder for extended stays connect a grill or stove to a refillable cylinder connect a high pressure grill or appliance that uses replaceable cylinders to rv's high pressure onboard supply connect a refillable cylinder to a regulator hose connectors use with automatic changeover maintain your rv catalog & internet only