Installation Guide
52
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 appli-
ance. 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
service 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 sup-
plier to reduce and limit the service line gas pressure. This valve reduces the service pressure
to the metering 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.