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16. Rain water pipes, bath wastes, and all wastes from sinks, hydraulic lifts or other
business appliances shall deliver outside the building on to open trapped gullies, or if they
must of necessity be within the building, on to special interceptors approved by the Vestry,
which must in every case be connected to the drains, and all inlets to the drains shall be
properly trapped except those inlets used for the purpose of ventilation.
The waste pipes should be protected by a syphon or other suitable trap to prevent a
current of air passing through the pipe into the interior of the house. "Bell" traps will on
no account be allowed.
17. Soil pipes placed vertically shall be of cast iron, not less than j in. thick, coated
inside and outside with Dr. Angus Smith's patent varnish and jointed with molten lead and
gaskin, or of drawn lead, weighing not less than seven lbs. per square foot.
They shall be of an internal diameter of 4 in. and placed outside the house or building,
and in every case extended full bore up to and above the eaves, finished with wire guard
covering, at such a height as effectually to prevent any escape of foul air into any building
in the vicinity thereof. Soil pipes are not to be used as rain water pipes.
18. The principle of construction of all water-closets is subject to the approval of the
Vestry. "D" traps, containers, receivers, and hopper-shaped pans cannot be permitted.
Where a series of water closets are placed one above the other, delivering into a common
soil pipe, the traps of each closet basin must be specially ventilated to prevent syphonage, by
means of a two-inch lead pipe turned into the main ventilation pipe at a point above the
highest water-closet connected with such soil pipe.
Great care must be taken that the connection between the water closet apparatus and
the syphon and the joint of the syphon with the drain or soil pipe are both made sound and
air and water tight, and with such materials as are not likely to contract or expand or be
affected by the urine passing over them into the drain or soil pipe.
19. No rain water will be allowed to deliver on to the footways ; water from the roofs,
bay windows, cornices, &c., must be taken into the system of house drainage, or it may with
the consent of the Vestry, be passed into the street channel by means of cast-iron gutter
pipes of an approved pattern laid across, and with their top side level with the
pavement of the footway.