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4. All horizontal pipes from water closets shall have an internal diameter of 6 in. if of
stoneware, and an internal diameter of 5 in. if of iron, and the connection with the foot of
the soil pipe or trap of basin must he made with proper bends and taper pipes. For the
drainage from areas, sinks and subsidiary drains, 4 in. pipes may be used.
5. The whole of the available fall is to be made use of, excepting it can be shown that
a steeper gradient than 1 in 20 would result therefrom, in which case the gradient may be
broken at the point where the drain emerges into the street, and a steeper gradient adopted
from the sewer to the line of the house. No drain to have a less fall than 1 in 50, unless
special provision be made for an automatic flushing of the drains by the adoption of an
approved flushing syphon.
6. Each house or building shall have a separate drain in connection with the sewer,
unless otherwise sanctioned by the Vestry, and no drain shall be laid under any house or
building should it be practicable to lay them outside the same, even though the length of
drain may be increased or the fall less favourable.
7. The drains shall be laid in direct lines between the points of inspection wherever
possible ; should curves be unavoidable, pipes of proper radii must be used.
8. The drains of all houses and buildings shalt consist of glazed stoneware pipes or of
cast-iron coated with Dr. Angus Smith's bituminous rust prevention composition, inside
and out.
9. All pipes must be laid with watertight joints upon cement concrete, and where they
pass underneath or near the buildings they must, if of stoneware, be surrounded with not less
than 6 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. 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.