boxes shall be constructed of acrylonitrile butadiene styrene (ABS) or
inorganic fiber-reinforced black polyolefin. Provide cast-iron,
ductile-iron, or plastic cover for valve box with the word "WATER" cast on
the cover. The minimum box shaft diameter shall be 133 mm 5.25 inches.
Coat cast-iron and ductile-iron boxes with bituminous paint applied to a
minimum dry-film thickness of 0.254 mm 10 mils.
2.2.5
Buried Utility Warning and Identification Tape
Provide detectable aluminum foil plastic backed tape or detectable magnetic
plastic tape manufactured specifically for warning and identification of
buried piping. Tape shall be detectable by an electronic detection
instrument. Provide tape in rolls, 80 mm 3 inches minimum width, color
coded for the utility involved with warning and identification imprinted in
bold black letters continuously and repeatedly over entire tape length.
Warning and identification shall read "CAUTION BURIED WATER PIPING BELOW"
or similar wording. Use permanent code and letter coloring unaffected by
moisture and other substances contained in trench backfill material.
2.3
PIPE SLEEVES
Provide where piping passes entirely through walls, floors, and roofs.
Secure sleeves in position and location during construction. Provide
sleeves of sufficient length to pass through entire thickness of walls,
floors, and roofs. Provide 25 mm one inch minimum clearance between
exterior of piping and interior of sleeve or core-drilled hole. Firmly
pack space with mineral wool insulation. Seal space at both ends of the
sleeve or core-drilled hole with plastic waterproof cement which will dry
to a firm but pliable mass, or provide a mechanically adjustable segmented
elastomeric seal. In fire walls and fire floors, seal both ends of pipe
sleeves or core-drilled holes with UL listed fill, void, or cavity material.
a.
Sleeves in Masonry and Concrete Walls, Floors, and Roofs: Provide
hot-dip galvanized steel, ductile-iron, or cast-iron sleeves.
Core drilling of masonry and concrete may be provided in lieu of
pipe sleeves when cavities in the core-drilled hole are grouted
smooth.
b.
Sleeves in Other Than Masonry and Concrete Walls, Floors, and
Roofs: Provide 26 gage galvanized steel sheet.
2.4
ESCUTCHEON PLATES
Provide split hinge metal plates for piping entering walls, floors, and
ceilings in exposed spaces. Provide polished stainless steel plates or
chromium-plated finish on copper alloy plates in finished spaces. Provide
paint finish on metal plates in unfinished spaces.
PART 3
EXECUTION
3.1
INSTALLATION
Installation, workmanship, fabrication, assembly, erection, examination,
inspection, and testing shall be in accordance with NFPA 13, except as
modified herein. Install piping straight and true to bear evenly on
hangers and supports. Do not hang piping from plaster ceilings. Keep the
interior and ends of new piping and existing piping affected by
Contractor's operations thoroughly cleaned of water and foreign matter.
Keep piping systems clean during installation by means of plugs or other
SECTION 13935N
Page 14
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