Installation Guide
40
Chapter 6: Pressure Test Procedures
The nal installation must be inspected and tested for leaks in accordance with local and/
or state codes. In the absence of local guidelines, test the system at 1½ times the maximum
working pressure, but not less than 3 PSI, using the procedures specied in Chapter 8 "Inspec-
tion, Testing and Purging" of the National Fuel Gas Code (NFPA 54/ANSI Z223). When local
codes are more stringent, local codes must be followed. If no local codes apply, test according
to the National Fuel Gas Code, IFGC, or UPC. The installer should never pressure test with the
pounds-to-inches regulator installed as this may damage the regulator.
6.1 Procedure For Low Pressure Systems
• Pressure testing should be performed during rough construction of the facility,
before interior walls are nished. This will permit a more complete inspection of
the piping system during the pressure testing, and save costly rework in the event
of leaks or other problems. Valencia Pipe Company is not responsible for repairs
necessary to correct defects discovered after interior walls are nished.
• Do not connect appliances or pressurize the system with fuel gas until after the
pressure test is completed.
• All gas outlets for appliance connections should be capped during pressure
testing.
• Use only non-corrosive leak check solutions. Rinse with water and dry the tubing
thoroughly after leak detection. Valencia Pipe Company recommends commer-
cially available uid leak detection solutions.
• Most utilities perform a leak test after setting the gas meter and prior to turning on
the gas. This test is performed after the nal construction is complete and nished
interior walls are in place. This test is performed to assure no damage was done to
the tubing during the closing-in construction process.
6.2 Procedure For Elevated Pressure Systems
Systems above ½ PSI require a two-part pressure test. The rst part is performed on the ele-
vated pressure section, between the meter connection and the pounds-to-inches line gas
pressure regulator (Figure 6.1). The second part is performed on the low pressure section,
between the pounds-to-inches line gas pressure regulator and the gas appliance outlet. If a
steel pipe "jumper" is inserted in place of the line gas pressure regulator the entire system can
be pressure tested in one step.
air in
Elevated Pressure Test
pressure
guage
Low Pressure Test
service
regulator meter
house line
regulator
(remove or valve off if
pressure test exceeds 10 PSI)
air in
pressure
guage
appliances
(capped or
valved off)
Figure 6.1 Pressure Test Requirements for a 2 PSI System