GR-253H is designed for propane tanks or cylinders (which are connected in pairs) in order to ensure a continuous and uninterrupted gas supply, such as in residential heating systems, commercial kitchens, or industrial processes. This regulator will reduce container pressure to approximately 10-15 PSIG then the second stage complete the process by reducing inlet pressure to 11 inches of water column (0.4 PSIG) outlet pressure.