m/sec 4 fps through all portions of the piping system. In the event that
this is impossible due to the size of the system, the Contracting Officer
(or designated representative) shall specify the number of fixtures to be
operated during flushing. Contractor shall provide adequate personnel to
monitor the flushing operation and to ensure that drain lines are
unobstructed in order to prevent flooding of the facility. Contractor
shall be responsible for any flood damage resulting from flushing of the
system. Flushing shall be continued until entrained dirt and other foreign
materials have been removed and until discharge water shows no
discoloration.
3.22.7.2
After Flushing
System shall be drained at low points. Strainer screens shall be removed,
cleaned, and replaced. After flushing and cleaning, system shall be
prepared for testing by immediately filling water piping with clean, fresh
potable or high-purity water as applicable to the system being flushed.
Any stoppage, discoloration, or other damage to the finish, furnishings, or
parts of the building, due to the Contractor's failure to properly clean
the piping system, shall be repaired by the Contractor. When the system
flushing is complete, the hot-water system shall be adjusted for uniform
circulation. Flushing devices and automatic control systems shall be
adjusted for proper operation. [All faucets and drinking water fountains,
to include any device considered as an end point device by NSF 61, Section
9, shall be flushed a minimum of 1 L 0.25 gallons per 24 hour period, ten
times over a 14 day period. Proof of compliance shall be submitted in
triplicate to the Contracting Officer.]
3.22.8
Operational Test
Upon completion of flushing and prior to disinfection procedures, the
Contractor shall subject the plumbing system to operating tests to
demonstrate satisfactory functional and operational efficiency. Such
operating tests shall cover a period of not less than 8 hours for each
system and shall include the following information in a report with
conclusion as to the adequacy of the system:
a.
Time, date, and duration of test.
b.
Water pressures at the most remote and the highest fixtures.
c.
Operation of each fixture and fixture trim.
d.
Operation of each valve, hydrant, and faucet.
e.
Pump suction and discharge pressures.
f.
Temperature of domestic hot water supply.
g.
Operation of each floor and roof drain by flooding with water.
h.
Operation of each vacuum breaker and backflow preventer.
i.
Complete operation of each water pressure booster system,
including pump start pressure and stop pressure.
j.
Compressed air readings at each compressor and at each outlet.
Each indicating instrument shall be read at 1/2 hour intervals.
The report of the test shall be submitted in quadruplicate. The
SECTION 15405A
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