Watflow LP-Gas Equipment with One Stage Propane Regulator, 8-12 psig Spring, 3/4" x 3/4" NPT,Back Mount.Connection Sizes: Inlet and outlet are 3/4-inch FNPT threaded connections.Maximum Inlet Pressure: 250 psig / 17,2 bar.Outlet Pressure Range: 8 to 12 psig / 0.55 bar to 0.82 bar.Capacity: Capable of delivering up to 1,600,000 BTU per hour.Vent Size: Equipped with a 3/4-inch NPT vent with a screen for safe exhaust.some paint chip