7.2.5.12 — Plastic Pipe, Fittings and Solvent Cement Used in Buildings

(1) Except as permitted by Sentences (2) and (3) and by Clause 3.1.5.2. (1)(d) and Article 3.1.5.22., combustible piping and tubing and associated adhesives are permitted to be used in a building required to be of noncombustible construction provided that, except when concealed in a wall or concrete floor slab, they, (a) have a flame-spread rating not more than 25, and (b) if used in a building described in Subsection 3.2.6., have a smoke developed classification not more than 50. (2) Combustible sprinkler piping is permitted to be used within a sprinklered floor area in a building required to be of noncombustible construction. (3) Polypropylene pipes and fittings are permitted to be used for drain, waste and vent piping for the conveyance of highly corrosive materials and for piping used to distribute distilled or dialyzed water in laboratory and hospital facilities in a building required to be of noncombustible construction, provided, (a) the building is sprinklered, (b) the piping is not located in a vertical shaft, and (c) piping that penetrates a fire separation is sealed at the penetration by a fire stop that has an FT rating not less than the fire-resistance rating of the fire separation when subjected to the fire test method in CAN/ULC-S115, “Fire Tests of Firestop Systems”, with a pressure differential of 50 Pa between the exposed and unexposed sides, with the higher pressure on the exposed side.

(1) Except as permitted by Sentences (3) to (8), combustible piping shall not be used if any part of the piping system penetrates, (a) a fire separation required to have a fire-resistance rating, or (b) a membrane that forms part of an assembly required to have a fire-resistance rating. (2) Combustible piping that is part of a system described in Sentence (1) shall not be located in a vertical service space. (3) Except as provided by Sentences (4) to (7), combustible piping is permitted to penetrate a fire separation required to have a fire-resistance rating or is permitted to penetrate a membrane that forms part of an assembly required to have a fire-resistance rating, provided the piping is sealed at the penetration by a fire stop that has an F rating not less than the fire-resistance rating required for the fire separation when subjected to the fire test method in CAN/ULC-S115, “Fire Tests of Firestop Systems”, with a pressure differential of 50 Pa between the exposed and unexposed sides, with the higher pressure on the exposed side. (4) Except as required by Sentence (7), combustible drain piping is permitted to penetrate a horizontal fire separation, provided it leads directly from a noncombustible water closet through a concrete floor slab and the piping is sealed at the penetration by a fire stop in conformance with Clause 3.1.9.1. (1)(a). (5) Except as required by Sentence (7), combustible piping is permitted to penetrate a vertical or horizontal fire separation, provided the fire compartments on each side of the fire separation are sprinklered and the piping is sealed at the penetration by a fire stop in conformance with Clause 3.1.9.1. (1)(a). (6) Except as required by Sentence (7), combustible piping not more than 25 mm in diameter containing chlorine gas is permitted to penetrate a fire separation between a chlorine gas service room built in conjunction with a public pool or public spa and the remainder of the building, provided the piping is sealed at the penetration by a fire stop in conformance with Clause 3.1.9.1. (1)(a). (7) Where combustible piping penetrates a firewall or a horizontal fire separation described in Sentence 3.2.1.2. (1), the piping shall be sealed at the penetration by a fire stop that has an FT rating not less than the fire-resistance rating required for the firewall or horizontal fire separation when subjected to the fire test method in CAN/ULC-S115, “Fire Tests of Firestop Systems”, and, (a) the fire stop shall have been tested with a pressure differential of 50 Pa between the exposed and unexposed sides, with the higher pressure on the exposed side, or (b) the fire compartments on each side of the firewall or horizontal fire separation shall be sprinklered. (8) Combustible piping for central vacuum cleaning systems is permitted to penetrate a fire separation, provided the installation conforms to the requirements that apply to combustible piping specified in Sentence (3).

(1) Where fire blocks are pierced by pipes, ducts or other elements, the effectiveness of the fire blocks shall be maintained around such elements.

(1) Piping, tubing, ducts, chimneys, wiring, conduit, electrical outlet boxes and other similar service equipment that penetrate a required fire separation shall be tightly fitted or fire stopped to maintain the integrity of the separation. (2) Penetrations of a firewall shall be sealed at the penetration by a fire stop that, when subjected to the fire test method in CAN/ULC-S115, “Fire Tests of Firestop Systems”, has an FT rating not less than the fire-resistance rating for the fire separation. (3) Except as provided in Sentences (4) to (12) and Article 9.10.9.7., pipes, ducts, electrical outlet boxes, totally enclosed raceways or other similar service equipment that partly or wholly penetrate an assembly required to have a fire-resistance rating shall be noncombustible unless the assembly has been tested incorporating such equipment. (4) Electrical wires or other similar wiring enclosed in noncombustible totally enclosed raceways are permitted to partly or wholly penetrate an assembly required to have a fire-resistance rating without being incorporated in the assembly at the time of testing as required in Sentence (3). (5) Single conductor metal-sheathed cables with combustible jacketing that are more than 25 mm in overall diameter are permitted to penetrate a fire separation required to have a fire-resistance rating without being incorporated in the assembly at the time of testing as required in Sentence (3), provided the cables are not grouped and are spaced a minimum of 300 mm apart. (6) Electrical wires or cables, single or grouped, with combustible insulation or jacketing that is not totally enclosed in raceways of noncombustible material, are permitted to partly or wholly penetrate an assembly required to have a fire-resistance rating without being incorporated in the assembly at the time of testing as required in Sentence (3), provided the overall diameter of the wiring is not more than 25 mm. (7) Combustible totally enclosed raceways that are embedded in a concrete floor slab are permitted in an assembly required to have a fire-resistance rating without being incorporated in the assembly at the time of testing as required in Sentence (3), where the concrete provides at least 50 mm of cover between the raceway and the bottom of the slab. (8) Combustible outlet boxes are permitted in an assembly required to have a fire-resistance rating without being incorporated in the assembly at the time of testing as required in Sentence (3), provided the opening through the membrane into the box does not exceed 160 cm². (9) Combustible water distribution piping is permitted to partly or wholly penetrate a fire separation that is required to have a fire-resistance rating without being incorporated in the assembly at the time of testing as required in Sentence (3), provided the piping is protected with a fire stop in conformance with Sentence 3.1.9.4. (4). (10) Combustible sprinkler piping is permitted to penetrate a fire separation provided the fire compartments on each side of the fire separation are sprinklered. (11) Sprinklers are permitted to penetrate a fire separation or a membrane forming part of an assembly required to have a fire-resistance rating without having to meet the fire stop requirements of Sentence (1), provided the annular space created by the penetration of a fire sprinkler is covered by a metal escutcheon plate in accordance with NFPA 13, “Installation of Sprinkler Systems”. (12) Combustible piping for central vacuum systems is permitted to penetrate a fire separation provided the installation conforms to the requirements that apply to combustible piping in Sentences 9.10.9.7. (2) to (6). (13) Fire dampers are permitted to penetrate a fire separation or a membrane forming part of an assembly required to have a fire-resistance rating without having to meet the fire stop requirements of Sentence (1), provided the fire damper is, (a) installed in conformance with NFPA 80, “Fire Doors and Other Opening Protectives,” or (b) designed specifically with a fire stop.

(1) Except as permitted in Sentences (2) to (6), combustible piping shall not be used where any part of a piping system partly or wholly penetrates a fire separation required to have a fire-resistance rating or penetrates a membrane that contributes to the required fire-resistance rating of an assembly. (2) Combustible piping not located in a vertical shaft is permitted to penetrate a fire separation required to have a fire-resistance rating or a membrane that forms part of an assembly required to have a fire-resistance rating, provided the piping is sealed at the penetration by a fire stop that has an F rating not less than the fire-resistance rating required for the fire separation. (3) The rating referred to in Sentence (2) shall be based on CAN/ULC-S115, “Fire Tests of Firestop Systems”, with a pressure differential of 50 Pa between the exposed and unexposed sides, with the higher pressure on the exposed side. (4) Combustible drain piping is permitted to penetrate a horizontal fire separation or a membrane that contributes to the required fire-resistance rating of a horizontal fire separation, provided it leads directly from a noncombustible water closet through a concrete floor slab. (5) Combustible piping is permitted, (a) on one side of a vertical fire separation provided it is not located in a vertical shaft, and (b) to penetrate a vertical or horizontal fire separation when the fire compartment on each side of the fire separation is sprinklered. (6) In a house containing two dwelling units, combustible piping is permitted on one side of a horizontal fire separation.