the-ordinances-of-the-legislative-counci-1890v2 — Page 415

PUBLIC HEALTH . [ 24 of 1887. ] 1005

27. Drains leading from a single trap and not being more than sixty feet Ventilation.
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 stone vare shall be securely fixed to the pipes.
Ventilating
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 Down-pipes.
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 Waste -pipes.
upper floors of buildings shall be of cast-iron socketted 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 socketted
pipes, or other approveil materials, securely fixed outside the wall, and
provided , at each point of connection, with aa suitable heail, and at their lower
extremity with aa 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, rivetted or lap -jointed sheet- iron will not be approved.
31. Waste-pipes, as well as down-pipes from roofs, shall not be connected Waste -pipes.
direct with any drain but shall discharge in the open air near to or over a trap
and they shall be bronght 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 Rain -water
ventilating shaft to any drain which communicates or is designed to communi- pipes.
cate with a public sewer.
NOTE :-Rain water-pipes terminate at the caves of the house a point not high enough
above windows to be a safe ventilating outlet.
33. Any person who may have laid any new drain or constructed new Covering
drains , up
drainage works connected therewith shall not cover up such drain or works
until the same shall have been previously inspected and passed by the board,
and such person shall give three clear days' written notice to the board that
such drain or works are ready for inspection, and such notice shall be delivered
at the office of the board in a form of which printed blank copies may be
obtained gratis in English and Chinese on application at the office of the
board, or in the case of villages - at any Village Police Station , between the
hours of 10 A.M. and 4 P.M.

34. Before any drain is covered in , it shall be inspected an :] tested to Inspection of
ascertain whether it is water or air -tight; and no drain that fails in this drains.
respect shall be passed . After inspection, the earth shall be carefully filled
in , above and around the drain ; and thoroughly rammed and consolidated.
For a depth of at least six inches, above the summit of the sockets of the
pipe, selected material, free from stones larger than will pass through a 2 "
ring, shall be used in filling in the trench.