Piping in a plumbing system shall be installed
without undue strains and stresses, and provisions shall be made for
expansion, contraction, and structural settlement.
Hangers, anchors and supports shall be of metal,
or other material of sufficient strength to support the piping and
its contents, except that piers may be of concrete, brick, or other
approved material.
Hangers and anchors shall be securely attached
to the building construction at sufficiently close intervals to support
the piping and its contents.
A.
Vertical piping. Vertical pipe of the following materials
shall be supported at not more than the distance intervals shown:
(1)
Cast iron soil pipe: at base and at each story height.
(2)
Threaded pipe (SPS): every other story height.
(3)
Copper tubing: at each story height, but not more
than 10 foot intervals for piping 1 1/2 inch in diameter and
larger; six foot intervals for piping 1 1/4 inch in diameter
and smaller.
(4)
Lead pipe: four foot intervals.
(5)
Plastic pipe: shall be anchored between floors and
ceiling and allow for thermal expansion.
(6)
Chemical waste piping: which shall be installed with
manufacturers recommendations.
B.
Horizontal piping. Horizontal pipe of the following
materials shall be supported at not more than the distance intervals
shown:
(1)
Cast iron soil pipe five foot intervals.
(a)
No hub soil pipe: support methods shall comply
with applicable standards.
(2)
Threaded Pipe: 12 foot intervals.
(3)
Copper tubing (1 1/4 inches or less): six-foot
intervals.
(4)
Copper tubing (1 1/2 inches or over): 10-foot
intervals.
(5)
Lead Pipe: on continuous metal or wood strips for
its entire length.
(6)
Plastic pipe: four-foot intervals, all sizes, hangers
and support methods shall comply with applicable standards.
(a)
Chemical waste piping, which shall be installed
with manufacturers recommendations.
(7)
In ground: piping in the ground shall be laid on a
firm bed for its entire length, except where support is otherwise
provided which is adequate in the judgment of the Administrative Authority.
Bases of cast-iron stacks shall be supported
on concrete, brick laid in cement mortar, metal brackets attached
to the building construction, or by other methods approved by Administrative
Authority. Other piping material shall be so anchored as to take the
load of the stack at the base.
