3.22.1.1
Test of Backflow Prevention Assemblies
Backflow prevention assembly shall be tested using gauges specifically
designed for the testing of backflow prevention assemblies. Gauges shall
be tested annually for accuracy in accordance with the University of
Southern California's Foundation of Cross Connection Control and Hydraulic
Research of the American Water Works Association Manual of Cross Connection
Control (Manual M-14). Report form for each assembly shall include, as a
minimum, the following:
Data on Device
Data on testing Firm
Type of Assembly
Name
Manufacturer
Address
Model Number
Certified Tester
Serial Number
Certified Tester No.
Size
Date of Test
Location
Test Pressure Readings
Serial Number and Test Date of
Gauges
If the unit fails to meet specified requirements, the unit shall be
repaired and retested.
3.22.1.2
Shower Pans
After installation of the pan and finished floor, the drain shall be
temporarily plugged below the weep holes. The floor area shall be flooded
with water to a minimum depth of 25 mm 1 inch for a period of 24 hours.
Any drop in the water level during test, except for evaporation, shall be
reason for rejection, repair, and retest.
3.22.1.3
Compressed Air Piping (Non-Oil-Free)
Piping systems shall be filled with oil-free dry air or gaseous nitrogen to
1.034 MPa 150 psig and pressure maintained for 2 hours with no drop in
pressure.
3.22.1.3
Compressed Air Piping (Oil-Free)
Piping systems shall be filled with gaseous nitrogen to 1.034 MPa 150 psig
and pressure maintained for a minimum of 2 hours without requiring
additional nitrogen. In lieu of gaseous nitrogen, oil-free dry air
specially filtered may be utilized. At point of introduction into piping
system, the oil-free dry air shall be injected through a three-stage
filtering assembly consisting of a 5 micrometer prefilter, and a two-stage
combination microcoalescer and filtration unit utilizing activated charcoal
granules for capture of oil vapors. The filtering assembly shall be rated
to remove 99.99998 percent of any oil, water, and solid particles 0.03
micrometers or larger present in the air.
3.22.2
Medical Gas and Vacuum Piping
Medical gas and vacuum piping systems shall be cleaned, pressure tested,
cross-connection tested, purged, and final tested in accordance with NFPA 99.
3.22.3
High-Purity Water (De-ionized or Distilled) System
The high-purity water systems shall be flushed and tested as specified,
except that high-purity water [obtained from the operational testing of the
SECTION 15405A
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