Installation Guide
Regulator, Gas Appliance Pressure A device for controlling and maintaining a uniform pressure
to the manifold of gas burning equipment. This valve is typically part of the appliance. It reduces
the pressure from 5.5" w.c. to the manifold pressure in the appliance.
Regulator, Line Gas Pressure (PSI to inches w.c.) A device placed in a gas line between the ser-
vice regulator and the appliance regulator for controlling, maintaining or reducing the pressure
in that portion of the piping system downstream of the device. This valve reduces the house line
pressure (typically 2 PSI) to the regulator manifold pressure (typically 8-10" w.c.).
Regulator, Service Pressure (PSI or inches w.c.) A device installed by the serving gas supplier to
reduce and limit the service line gas pressure. This valve reduces the service pressure to the meter-
ing pressure. It is located upstream of the gas meter.
Regulator Vent The opening in the atmospheric side of the regulator housing permitting the in
and out movement of air to compensate for the movement of the regulator diaphragm.
Specic Gravity As applied to gas, the ratio of the weight of a given volume to that of the same
volume of air, both measured under the same conditions.
Striker Plates A special type of shielding device used when concealed tubing is run through wall
studs, oor and ceiling joists or other structural members where tubing movement is restricted.
Valve, Manual Shut-o A valve (located in the piping system and readily accessible and operable
by the consumer) used to shut o individual equipment.
Vent Limiter Device Restriction/orice type device in the vent outlet of a pressure regulator that
controls or limits leakage, in the event of a diaphragm leak. It also allows the diaphragm to move
freely to control pressure.