Appliance Regulators Maxitrol Poppet Design, Straight Thru Flow, Lever Acting, Balanced Valve, Vent Limiter Designs on serveral models Max Inlet Pressure: 1/2 – 10 PSIG (Depending on Model) Outlet Range: 1″ w.c. to 2 PSIG (Depending on Model) Sizes: 1/2″ to 3″ NPT