Gas appliance pressure regulators requiring access to the atmosphere for successful operation shall be equipped with a vent pipe leading to the outer air or into the combustion chamber adjacent to a constantly burning pilot, unless they are constructed or equipped to limit the escape of gas from the vent opening in the event of diaphragm failure to not more than 1.0 cubic feet per hour of a 0.6 specific gravity gas at seven inches of water column pressure. In case of vents leading to the outer air, means shall be employed to prevent water from entering the pipe and also to prevent stoppage of it by insects and foreign matter. Vents entering the combustion chamber shall be located so that the escaping gas will be readily ignited from the pilot flame and so that the heat liberated will not adversely affect the operation of the thermal element. The terminus of the vent shall be securely held in a faxed position relative to the pilot flame.
(Ord. 368. Passed 8-4-50.)