7.2.3.

(1) Except as provided for in Sentence (2), every trap shall,

(a) have a trap seal depth of at least 38 mm,

(b) be so designed that failure of the seal walls will cause exterior leakage, and

(c) have a water seal that does not depend on the action of moving parts.

(2) The trap seal depth on fixtures draining to an acid waste system shall be a minimum of 50 mm.

(3) Every trap that serves a lavatory, a sink or a laundry tray shall,

(a) be provided with a cleanout plug of a minimum ¾ in. size located at the lowest point of the trap and of the same material as the trap, except that a cast iron trap shall be provided with a brass cleanout plug, or

(b) be designed so that part of the trap can be removed for cleaning purposes.

(4) A bell trap or an S-trap shall not be installed in a drainage system.

(5) A drum trap shall not be installed in a drainage system.

(6) Except as permitted in Sentence (7), no bottle trap shall be used in a plumbing system.

(7) A bottle trap may be used on a laboratory sink or other fixture equipped with corrosion resistant fittings.

(8) No running trap shall be installed in a plumbing system unless an accessible handhole is provided for cleaning of the trap, and where the trap is too small to accommodate a handhole, a cleanout shall be provided.

(1) Every interceptor shall be designed so that it can be readily cleaned.

(2) Every grease interceptor shall be designed so that it does not become air bound.

(1) Tubular metal or plastic traps that conform to CAN/CSA-B125, “Plumbing Fittings” shall be used in accessible locations.