final bid specs 09328.pdf - Freese and Nichols, Inc.

the public from open trenches. Erect and maintain barricades and warning devices in
accordance with OSHA requirements.
2. Backfill trenches after piping has been tested and approved. Material for backfilling shall
be a clean, sandy loam up to 4" above the top of pipe. Above that point, use overburden
removed in the excavation process. Overburden shall be free of trash, debris, rocks or
boulders. Deposit backfill material in 12" layers and compact to the density of the
adjacent, undisturbed soil. Remove all excess material from the site.
3.03 TESTING
A. PIPING SYSTEMS
1. General: Furnish pumps, compressors, gauges, equipment and personnel required, and
test as necessary to demonstrate the integrity of the finished installation.
2. Soil, Sanitary Waste and Vent: Unless otherwise directed by the authority having
jurisdiction, plug all openings except for the highest opening and fill with water to the
point of overflow. Perform a water test consisting of no less than ten feet of head shall be
applied to the system. Allow to stand one hour or longer as required. The system should
be water tight and leak free. If leaks exist, repair and retest.
3. Water: Unless otherwise directed by the authority having jurisdiction, hydrostatically test
and make tight the entire system at 120 psi. Retain for four hours. The system should be
water tight and leak free. If leaks exist, repair and retest.
4. Compressed Air: Unless otherwise directed by the authority having jurisdiction,
pneumatically test and make tight at 1-1/2 times the normal operating pressure and not
less than 50 psi. Where the test pressure exceeds 125 psi, the test pressure shall not
exceed a value that produces a hoop stress in the piping greater than 50 percent of the
specified minimum yield strength of the pipe. Reduce test pressure if required. Retain for
four hours minimum or not less than ½ hour for each 500 cubic feet of pipe volume or
fraction thereof. When testing a system having a volume of less than 10 cubic feet, the
test duration shall be permitted to be reduced to 10 minutes. For piping systems having
a volume of more than 24,000 cubic feet, the duration of the test shall not be required
The system should be air tight and leak free. If leaks exist, repair and retest. Verify
capacities and pressure ratings of service regulators and meters. Verify correct pressure
settings for service regulators.
3.04 DEMONSTRATION OF EQUIPMENT
A. Prior to final acceptance, Contractor and Manufacturer's Representative of Domestic Water
Heaters and associated accessories and controls, each shall provide a minimum of 4 hours
(or as long as required by the Owner) to demonstrate to the Owner the proper operation of
the equipment.
B. Prior to final acceptance, Contractor shall provide a minimum of 4 hours (or as long as
required by the Owner) to demonstrate to the Owner the proper operation of all the plumbing
equipment and associated accessories and controls.
3.05 FLUSHING
A. General: After piping systems have been tested and approved, systems shall be flushed.
Furnished compressors, pumps, equipment, personnel, etc. required to flush piping systems.
B. Soil, Sanitary Waste and Vent, storm drainage: Unless otherwise directed by the authority
having jurisdiction, thoroughly flush piping systems with water until free of debris, or
detrimental materials that may cause partial or full blockage. As a minimum comply with the
International Plumbing Code, Section 302, of the latest edition.
C. Water Piping: Unless otherwise directed by the authority having jurisdiction, flush piping with
water until water flows clear for a minimum of 60 seconds per 100 linear feet of piping being
flushed at a velocity of 9 feet per second.
Plumbing Systems 15400-17
DPR09328