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163
Jointing of
pipes.
6. Unless patent jointed pipes of an
used all joints shall be made with neat Portland cement, and each
pipe after being laid shall be cleared internally of all Projecting pieces
of cement of other obstructions.
Junctions 7. All junctions of one line of drain pipes with another
shall be made only at the sides of the pipes, means of properly
curved or oblique junction pipes, no T or right angled junctions being
permitted. Taper pipes shall be used where the size of a drain is
reduced in the general run.
Pipes bedded
in 6-in. concrete.
8. All drains beneath a building shall be completely
embedded in and surrounded with good Portland cement
concrete at least 6 inches thick, made in the proportion of 4 parts of
ballast, 1 of sand, and 1 of Portland cement.
Syphontrap. 9. Every main drain which may directly communicate
with any sewer shall have a water syphon trap at a point within the
premises of the said building, as far distant as may be practicable from
such building, and as near as may be practicable to the sewer, and
such trap shall have a cleansing branch connected with the inspection
chamber hereafter described.
Front inspection
chamber.
10. There shall be provided in connection with such trap,
a suitably constructed water-tight inspection chamber at least 3 feet
by 2 feet internal measurement, with walls of 4½-inch brickwork, built
in cement on a concrete foundation, and rendered with cement ½-inch
thick, provided the depth of such chamber does not exceed 3 feet; if
exceeding this depth 9-inch brickwork to be substituted for 4½-inch.
An open glazed channel shall be provided at the bottom of same, and
it shall be covered with an approved moveable air-tight cover.
Back inspection
chamber.
11. There shall be provided at the upper end of the
main drain in a straight line with the front chamber (and
in a position to take as many connections as possible) another similarly
constructed water-tight inspection chamber, at least 3 feet by 2 feet
internal measurement, with an air-tight cover as above.
Additional
chambers.
12. Additional inspection chambers as described above
shall be nrovided where directed.
Inlets to be
trapped.
13. Every inlet to any drain, not being an inlet provided
in pursuance of the regulation in that behalf as an
ing for the ventilation of such drain shall be properly trapped.
Ventilation of
drains.
14. There shall be provided at least two utrapped
openings to the drains, as follows .
Air inlet. a. One opening to act as an inlet for fresh air shall
be at or near the level of the surface of the ground,
ting by means of a 4-in. iron pipe, with the front inspection chamber already provided, the opening of which pipe shall be
guarded by an approved grating.