Div. B › Part 7 › 7.4 › 7.4.5 — Traps

7.4.5.4 — Location and Cleanout for Building Traps

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(1) Where a building trap is installed, it shall,

(a) be provided with a cleanout fitting on the upstream side of and directly over the trap,

(b) be located upstream of the building cleanout, and

(i) inside the building as close as practical to the place where the building drain leaves the building, or

(ii) outside the building in a manhole.

OBC Definitions

Defined terms on this page

building drain

means the lowest horizontal piping, including any vertical offset, that conducts sewage, clear water waste or storm water by gravity to a building sewer.

building trap

means a trap that is installed in a sanitary building drain or sanitary building sewer to prevent circulation of air between the sanitary drainage system and a public sewer.

cleanout

means a fitting access in a drainage system or venting system that is installed to provide access for cleaning and inspection and that is provided with a readily replaceable air tight cover.

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.

building

(a) a structure occupying an area greater than ten square metres consisting of a wall, roof and floor or any of them or a structural system serving the function thereof including all plumbing, works, fixtures and service systems appurtenant thereto,
(b) a structure occupying an area of ten square metres or less that contains plumbing, including the plumbing appurtenant thereto,
(c) plumbing not located in a structure,
(c.1) a sewage system, or
(d) structures designated in the building code; Act

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