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continued upwards without diminution of its diameter, and
(except where unavoidable) without any bend or angle being
formed in such soil pipe, to such a height and in such a
position as to afford by means of the open end of such soil
pipe a safe outlet for foul air, and so that such open end
shall in all cases be above the highest part of the roof of the
building to which the soil pipe is attached, and where practicable,
be not less than three feet above any window within
twenty feet measured in a straight line from the open end of
such soil pipe.
He shall furnish the open end of such soil pipe with a
wireguard covering, the openings in the meshes of which
shall be equal to not less than the area of the open end of
the soil pipe.
In all such cases where he shall connect a lead trap or
pipe with an iron soil pipe or drain he shall insert between
such trap or pipe and such soil pipe or drain a brass thimble,
and he shall connect such lead trap or pipe with such
thimble by means of a wiped or over-cast joint, and he shall
connect such thimble with the iron soil pipe or drain by
means of a joint made with molten lead, properly caulked.
In all such cases where he shall connect a stoneware
trap or pipe with a lead soil pipe, he shall insert between
such stoneware trap or pipe and such soil pipe a brass socket
or other similar appliance, and he shall connect such stoneware
trap or pipe by inserting it into such socket, making the
joint with Portland cement, and he shall connect; such
socket with the lead soil pipe, by means of a wiped or overcast
joint.