Div. B › Part 7 › 7.3 › 7.3.3 — Joints and Connections

7.3.3.11 — Indirect Connections

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(1) Where a fixture or device is indirectly connected, the connections shall be made by terminating the fixture drain above the flood level rim of a directly connected fixture to form an air break.

(2) The size of the air break shall be at least 25 mm.

OBC Definitions

Defined terms on this page

air break

means the unobstructed vertical distance between the lowest point of an indirectly connected waste pipe and the flood level rim of the fixture into which it discharges.

directly connected

means physically connected in such a way that neither water nor gas can escape from the connection.

fixture

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

fixture drain

means the pipe that connects a trap serving a fixture to another part of a drainage system.

flood level rim

means the top edge at which water can overflow from a fixture or device.

indirectly connected

means not directly connected.

size

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

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