details and the underground water mains for the
sprinkler system. The drawings must show details of
the water service point-of-entry into the building
and through the floor slab, and underground piping
restraints, including number and size of restraining
rods and thrust blocks.
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2.4.1
Pipe
Piping from a point 150 mm 6 inches above the floor to [a point 1500 mm 5
feet outside the building wall] [the point of connection to the existing
water mains] shall be ductile iron with a rated working pressure of [1034]
[1207] [_____] kPa [150] [175] [_____] psi conforming to AWWA C151, with
cement mortar lining conforming to AWWA C104. Piping more than 1500 mm 5
feet outside the building walls shall comply with Section 02510A WATER
DISTRIBUTION SYSTEM.
2.4.2
Fittings and Gaskets
Fittings shall be ductile iron conforming to AWWA C110. Gaskets shall be
suitable in design and size for the pipe with which such gaskets are to be
used. Gaskets for ductile iron pipe joints shall conform to AWWA C111.
2.4.3
Gate Valve and Indicator Posts
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NOTE: This paragraph will be deleted if underground
valves are either not required or are specified
elsewhere.
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Gate valves for underground installation shall be of the inside screw type
with counter-clockwise rotation to open. Where indicating type valves are
shown or required, indicating valves shall be gate valves with an approved
indicator post of a length to permit the top of the post to be located 900
mm 3 feet above finished grade. Gate valves and indicator posts shall be
listed in UL Fire Prot Dir or FM P7825a and FM P7825b.
2.5
ABOVEGROUND PIPING COMPONENTS
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NOTE: The following are basic restrictions on the
use of plastic pipes:
a. Plastic piping will be used only in light hazard
occupancies and in residential occupancies.
b. Plastic piping will not be used in combustible
concealed spaces that are required to be sprinklered.
c. Plastic piping will not be used in spaces where
ambient temperature exceed 65 Degrees C (150 Degrees
F).
d. Plastic piping must be protected, as a minimum,
by either (1) one layer of 9.525 mm (3/8 inch) thick
gypsum board, or (2) a suspended membrane ceiling
with lay-in ceiling panels or tiles having a weight
SECTION 13930A
Page 17
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