shafts that constitute air ducts or that enclose air ducts shall be
noncombustible in accordance with NFPA 90A. Installation of plastic pipe
shall be in compliance with NFPA. The plumbing system shall be installed
complete with necessary fixtures, fittings, traps, valves, and accessories.
Water and drainage piping shall be extended 1.5 meters 5 feet outside the
building, unless otherwise indicated. A [gate] [or] [full port ball]
[ball] valve and drain on the water service line shall be installed inside
the building approximately 150 mm 6 inches above the floor from point of
entry. Piping shall be connected to the exterior service lines or capped
or plugged, if the exterior service is not in place. Sewer and water pipes
shall be laid in separate trenches, except when otherwise shown. Exterior
underground utilities shall be at least 300 mm 12 inches below the [average
local frost depth] [finish grade] or as indicated on the drawings. If
trenches are closed or the pipes are otherwise covered before being
connected to the service lines, the location of the end of each plumbing
utility shall be marked with a stake or other acceptable means. Valves
shall be installed with handle horizontal to or above the valve body.
3.2
WATER PIPE, FITTINGS, AND CONNECTIONS
3.2.1
Utilities
The piping shall be extended to fixtures, outlets, and equipment. The hot
water and cold water piping system shall be arranged and installed to
permit draining. The supply line to each item of equipment or fixture,
except faucets, flushing devices, or other control valves which are
supplied with integral stops, shall be equipped with a shutoff valve to
enable isolation of the time for repair and maintenance without interfering
with operation of other equipment or fixtures. Supply piping to fixtures,
faucets, hydrants, shower heads, and flushing devices shall be anchored to
prevent movement.
3.2.2
Cutting and Repairing
The work shall be carefully laid out in advance, and unnecessary cutting
through construction shall be avoided. Damage to building, piping, wiring,
or equipment as a result of cutting shall be repaired by mechanics skilled
in the trade involved.
3.2.3
Protection to Fixtures, Materials, and Equipment
Pipe openings shall be closed with caps or plugs during installation.
Fixtures and equipment shall be tightly covered and protected against dirt,
water, chemicals, and mechanical injury. Upon completion of the work, the
fixtures, materials, and equipment shall be thoroughly cleaned, adjusted,
and operated. Safety guards shall be provided for exposed rotating
equipment.
3.2.4
Mains, Branches, and Runouts
Piping shall be installed as indicated. Pipe shall be accurately cut and
worked into place without springing or forcing. Structural portions of the
building shall not be weakened. Aboveground piping shall run parallel with
the lines of the building, unless otherwise indicated. Branch pipes from
service lines may be taken from top, bottom, or side of main, using
crossover fittings required by structural or installation conditions.
Supply pipes, valves, and fittings shall be kept a sufficient distance from
other work and other services to permit not less than 15 mm 1/2 inch
between finished covering on the different services. Bare and insulated
SECTION 15405A
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