7.3.5.

(1) Where piping is installed underground, the backfill shall be carefully placed and tamped to a height of 300 mm over the top of the pipe and shall be free of stones, boulders, cinders and frozen earth.

(1) Where asbestos-cement drainage pipe or vitrified clay is located less than 600 mm below a basement floor and the floor is constructed of other than 75 mm or more of concrete, the pipe shall be protected by a 75 mm layer of concrete installed above the pipe.

(1) Where piping passes through or under a wall it shall be installed so that the wall does not bear on the pipe.

(1) Where piping may be exposed to freezing conditions it shall be protected from the effects of freezing.

(1) Plumbing, piping and equipment exposed to mechanical damage shall be protected.

(1) Piping used for internal leaders, which may be subject to condensation, shall be installed in a manner that limits the risk of damage to the building due to condensation.

(1) Except as permitted in Sentence (2), a buried water service pipe shall be separated from the building drain, building sewer and a private sewage disposal system, by not less than 2 440 mm measured horizontally, of undisturbed or compacted earth.

(2) The water service pipe may be closer than 2 440 mm or be placed in the same trench with the building drain or building sewer if,

(a) the following conditions are met:

(i) the bottom of the water service pipe at all points is at least 500 mm above the top of the building drain or building sewer, and

(ii) when in a common trench with the building drain or building sewer, the water service pipe is placed on a shelf at one side of the common trench,

(b) the water service pipe is constructed of a single run of pipe with no joints or fittings between the street line or source of supply on the property and the inside face of the building, or

(c) the building drain or building sewer is constructed of piping which is pressure tested in accordance with Subsection 7.3.7. at 345 kPa.

(3) A buried water service pipe shall be constructed of a single run of pipe with no joints or fittings between the street line or source of supply on the property and the inside face of the building if the water service pipe is less than 15 m from,

(a) a private sewage disposal system, or

(b) a source of pollution other than a private sewage disposal system.