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Vertical piping shall be secured at sufficient intervals to keep the pipe in alignment and to carry the weight of the pipe and contents.
Supports shall provide secure support for the pipe without excessive strain on joints or connections and shall properly transmit the load to the building structure or to independent posts, piers, and foundations.
All vertical drainage piping shall have base supports and, when more than 30 feet in height, shall have intermediate supports spaced not more than 2 stories or 25 feet on centers. Closet bends, traps, trap-arms and similar branches shall be firmly secured against movement in any direction.

Exception: No-hub cast iron soil pipe shall be supported with a riser clamp located at each floor. When the distance between floors is greater than 10 feet, the vertical piping shall be supported every 10 feet using riser clamps where possible or rigid supports securely fastened to the building structure.
Building drains shall not be installed or arranged so as to support load from vertical piping. Pipe support shall be an approved type. Pipe hooks shall not be used.
Aluminum and plastic pipe shall be supported a minimum of at least 5 feet on centers and closer, if required, to prevent horizontal deformation of the piping.
Horizontal piping above ground shall be supported at points sufficiently close to keep it in alignment and prevent sagging. Spacing for pipe supports shall comply with Sections P-602.1.1 through P-602.1.5.
Supports for bell-and-spigot cast iron pipe shall be a maximum 7 feet on centers.
Cast iron no-hub soil pipe shall be supported by using threaded rod and clevis hangers. Sway bracing shall be installed where necessary. Hangers shall be provided at least every other joint, except that when the developed length between hangers exceeds 5 feet, they shall be provided at each joint. In no case shall hangers or supports be more than 5 feet apart. Hangers shall be placed immediately adjacent to the coupling. Piers of masonry or other suitable materials shall be approved to provide support.
Flexible plastic pipe and rigid polyethylene (fuseal or similar approved drainage system) shall have continuous supports for the entire length. ABS and PVC plastic pipe shall be supported at maximum 5- foot intervals.
Aluminum pipe shall be supported at maximum 5-foot intervals.
All other piping materials shall be supported at maximum 10-foot intervals.
Horizontal piping underground shall be firmly supported on the bottom of the trench, and proper depressions shall be provided under the bells of drainage piping to insure support for its entire length.
Drainage piping installed in soft soil or filled ground shall be hard copper type "L" or bell-and-spigot cast iron pipe with lead and oakum joints.
Hangers and anchors shall be made of material of adequate strength to provide secure permanent support, and shall be securely attached to the building construction.
Hangers and anchors attached to masonry shall not be fastened to wooden plugs inserted in the masonry.
All piping in a plumbing system shall be installed without excessively stressing or straining any pipe or connection. Where necessary, provision shall be made for expansion, contraction, and settlement of the supporting structure.
All piping in a plumbing system shall be installed in such manner as to protect pipes against breakage, corrosion, freezing and entry of foreign objects.
Pipes passing under or through walls shall be protected against loads which might result in breakage.
Pipes passing through or under cinder concrete or other corrosive material shall be protected against external corrosion with bitumastic material.
Abandoned laterals shall have the house trap removed, and the pipe shall be hermetically sealed by a cap or plug at the curb line. Abandoned drainage piping within the building shall be hermetically sealed by a cap or plug.
Abandoned water service shall be capped or plugged at the curb or shall have the ferrule removed. Abandoned water piping within the building shall be capped or plugged with a fitting.
A plumbing permit is required for abandonment, and work shall be performed by a Registered Master Plumber.
In new buildings, all soil, waste, and vent pipes above ground shall be located inside the buildings.
In existing buildings, pipes shall be permitted outside with approval of the Department.
Underground piping outside of buildings shall have a minimum of 3 feet of cover, except curbextended rainwater piping.
Exterior openings provided for the passage of piping shall be effectively sealed against rodents.
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