b5a5d860_for_any_fuel_gas_fired__boiler__Item
[Safety] An automatic pressure regulating valve steps natural gas supply pressure down to the level needed by the burner. [Reason] If the natural gas supply line pressure rises too much, the burner may over fire, putting out the flame or overheating the boiler. [Item] 
Natural Gas Pressure Regulator
Safety controls for any fuel gas fired  boiler
Item