Div. B › Part 7 › 7.4 › 7.4.10 — Hydraulic Loads

7.4.10.2 — Hydraulic Loads for Fixtures

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(1) The hydraulic load from a fixture that is listed in Table 7.4.9.3. is the number of fixture units set forth in the Table.

(2) Except as provided in Sentence (1), the hydraulic load from a fixture that is not listed in Table 7.4.9.3. is the number of fixture units set forth in Table 7.4.10.2. for the trap of the size that serves the fixture.

Tables & Figures referenced

Table 7.4.9.3 : Minimum Permitted Size of Fixture Outlet Pipe and Hydraulic Loads for Fixtures : Forming Part of Sentences 7.4.9.3.(1) and 7.4.10.2.(1)

Loading Table 7.4.9.3…

Table 7.4.10.2 : Permitted Hydraulic Load from a Fixture Based on Size of Trap : Forming Part of Sentence 7.4.10.2.(2)

Loading Table 7.4.10.2…

OBC Definitions

Defined terms on this page

bathroom group

means a group of plumbing fixtures installed in the same room, consisting of one domestic-type lavatory, one water closet and either one bathtub, with or without a shower, or one one-headed shower.

fixture

means a receptacle, plumbing appliance, apparatus or other device that discharges sewage or clear water waste, and includes a floor drain.

fixture outlet pipe

means a pipe that connects the waste opening of a fixture to the trap serving the fixture.

fixture unit

means , when applied to a drainage system, the unit of measure based on the rate of discharge, time of operation and frequency of use of a fixture that expresses the hydraulic load that is imposed by that fixture on the drainage system.

listed

means equipment or materials included in a list published by a certification organization accredited by the Standards Council of Canada.

size

means the nominal diameter by which a pipe, fitting, trap or other similar item is commercially designated.

trap

means a fitting or device that is designed to hold a liquid seal that will prevent the passage of gas but will not materially affect the flow of a liquid.

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