propane regulators best seller! indicators show when reserve cylinder is low 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 provides easy changeover from empty to full cylinder for use on single tank horizontal regulator mount to be used simultaneously propane fittings propane hose assemblies use to connect hose to regulator inlet best seller! connects a refillable propane cylinder to your rv hook up an auxiliary propane cylinder for extended stays connect a high pressure grill or appliance that uses hose connectors use with automatic changeover maintain your rv