9214
Ventilation.
Ventilation.
Ventilating-pipes.
Down-pipes.
Waste-pipes.
Waste-pipes.
Rain-water pipes.
ORDINANCE No. 24 of 1887.
Public Health.
26. Every main house-drain shall have a ventilating opening near to its lower end and no trap or other obstruction to the free circulation of air shall exist between this opening and the one described in the preceding bye-law.
If there be a trap between the house-drain and the public sewer, then an opening shall be made on the house-side of the trap, and the said opening shall be so arranged as to give access to the trap for inspection, cleansing or repair.
If there be no trap between the public sewer and the house-drain no special opening need be provided at the lower end.
27. Drains leading from a single trap and not being more than sixty feet long, need not be provided with an elevated ventilating opening at their upper end but if this be omitted, they shall be provided with a trap, disconnecting them from the public sewer, and shall have a ventilating opening at the lower end on the house-side of the trap.
28. Ventilating and fall pipes of stoneware shall be securely fixed to the exterior surfaces of walls with wrought iron bands fitted round the pipe and made fast to the wall with two wrought iron spikes not less than four inches in length. Metal pipes shall also be fixed as above or shall have two ears fixed to them and secured to the wall with two wrought iron spikes, not less than four inches long.
29. Down-pipes, conveying rain-water from roofs, shall be constructed of cast or welded wrought-iron, and when the down-pipe discharges into the house-drain it shall be completely disconnected therefrom, as described in bye-law No. 31 and fitted with a bend, shoe or pedestal pipe. Wherever practicable, the rain-water down-pipes on the street side of buildings, shall be carried under the footpath and discharge into the side-channel.
NOTE.-It is most important that such pipes should be completely disconnected from the sewers so that they cannot by any possibility serve as conduits for conducting sewer air up and into the dwelling.
30. Waste-pipes from baths, sinks and other similar appliances, on the upper floors of buildings shall be of cast-iron socketed pipes or wrought-iron welded-pipes with screwed joints coated with bituminous composition, or in the case of wrought-iron, galvanised; or of well glazed stone-ware socketed pipes, or other approved materials, securely fixed outside the wall, and provided, at each point of connection, with a suitable head, and at their lower extremity with a bend, shoe or pedestal pipe. All joints of stoneware pipes to be made in the manner provided for in bye-law 5.
NOTE.-Zinc, tin-plate, riveted or lap-jointed sheet-iron will not be approved.
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31. Waste-pipes, as well as down-pipes from roofs, shall not be connected direct with any drain but shall discharge in the open air near to or over a trap and they shall be brought down to within one foot or less from the ground.
32. No rain water-pipe from the roof of a building shall be used as a ventilating shaft to any drain which communicates or is designed to communicate with a public sewer.
NOTE.-Rain water-pipes terminate at the eaves of the house a point not high enough above windows to be a safe ventilating outlet.