Features:- Compact Low Pressure Two-Stage Automatic Changeover Regulator- Compact version- Automatically redirects LP gas vapor flow from an empty designated service cylinder to a reserve cylinder without interruption- Green indicator dome changes to red when the service cylinder needs to be filled- 1/4 Inverted Flare Inlet Connections- 3/8 FPT Outlet Connection- Zinc Die Cast- Molded Rubber Diaphragms- UL Approved- 2nd Stage Relief Mechanism Per UL 144- Powder Coated