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9. Method of Jointing.— All pipes must be laid with watertight joints upon cement concrete,
and where they pass underneath or near to buildings they must, if of stoneware, be surrounded
with not less than G in. of cement concrete in the proportions of two parts of clean sharp
sand, four parts of clean ballast and one part of Portland cement, all by measure; where the
covering of pipes beneath any building is less than one foot, iron pipes shall be used with lead and
gaskin joints.
10. Junctions with Main Sewer.—The connection with the street sewer will be made by
the Vestry at the owner's expense, including so much of the work as will be beneath the public
way, and upon the estimated amount of same being paid by the applicant to the Surveyor to the
Vestry.
11. No drain shall be laid on the premises until the drain from the sewer to the premises
has been laid in accordance with the above regulation.
12. Ventilation.—For the effectual ventilation of the drains, at least two untrapped openings
shall be provided: —
(a) One opening, being at or near the level of the surface of the ground, communicating
with the drains by means of a suitable pipe, shaft, or disconnecting chamber, as
near as practicable to the trap, which shall be provided between the main drain of
the building and the sewer with which such drain communicates; such opening
shall be situate on that side of the trap nearer the building, and fitted with a
mica valve.
(b) The second opening shall be obtained by carrying up from the point or head of the
drains farthest distant from the first mentioned opening, an iron ventilating pipe
not less than three inches internal diameter, fitted with perfectly tight joints and
wire guard covering at top, carried up to such a height as to be not less than 3 ft.
above any window within 20 ft. of the same, and in such a manner as effectually
to prevent any escape of foul air from such pipe or shaft into any building in the
vicinity thereof.
13. Disconnecting Drainage.—A suitable trap must be provided in every main drain which
directly communicates with the sewer at a point as distant as may be practicable from the building,