THE HONGKONG GOVERNMENT GAZETTE, FEBRUARY 12, 1910.
33. Open surfaces such as back-yards, court-yards or other spaces on which slops are thrown, or from which foul waters flow, shall be provided with trapped connections to the covered drains for the removal of such waters as well as some of the rain-water,
a storm-water channel or drain.
34. Wherever an outlet is available, surface channels shall be provided to carry excessive rain-fall from the premises, and these channels shall be properly connerted with As many 4 inch traps as the Building Authority may approve shall be placed in such surface channels and connected with the covered drains for the purpose of flushing the sewers.
35. The rain-water from roofs, which slope towards enclosed court-yards or back-yards may, if diversion to the surface channel is impracticable, be received into the covered- drains, but no ventilating pipe shall be used for the conveyance of rain-water from the
roof.
36. No person shall, where it can possibly be avoided, lay any pipe for conveying sub-soil drainage in such manner or in such position as to communicate directly with any sewer, cess-pool or covered drain used for the conveyance or reception of sewage.
37. In every case where the course of a drain or sewer shall be diverted, any cesspool previously existing and into which such drain or sewer may have previously emptied, shall be cleansed, deodorized and filled with clean earth.
38. Every water-closet and urinal in a building shall be constructed against an external wall, and all apparatus shall be fixed as near to such external wall as in the opinion of the Building Authority is practicable.
39. Every water-closet and urinal shall be furnished with a separate cistern or flushing box unless the Building Authority shall otherwise permit. In the case of water-closets such cistern or flushing oox shall be so constructed, fitted and placed as to admit of a supply of water to such closet, pan, basin, or other receptacle of not less than two gallons and not more than three gallons each time such pan, basin or other receptacle is used.
Such cistern or flushing box shall in all cases, except where it is in connection with a valve closet, be of the type known as the Water Waste Preventor.
Such cistern shall be provided with a suitable ball-cock fixed on the supply-pipe, and it shall be furnished with an overflow pipe carried through the external wall of the building into the open air and terminating in a conspicuous place.
Provided that in the case of trough water-closets and urinals such cistern or flushing box shall be of automatic action and of such size and pattern and discharging at such intervals as may be approved by the Building Authority.
40. Every water-closet and urinal shall be furnished with a suitable apparatus for the effectual application of water to any pan, basin, or other receptacle with which such appa- ratus may be connected and used, and for the effectual flushing and cleansing of such pan, basin, or other receptacle, and for the prompt and effectual removal theretrom of any solid or liquid filth which may from time to time be deposited therein.
Every water-closet and urinal shall be furnished with a pan, basin, or other suitable receptacle or receptacles of non-absorbent material, and of such shape, capacity and mode of construction as to receive a sufficient quantity of water, and every such receptacle in connection with a water-closet shall in addition contain a sufficient quantity of water to allow of all filth which may from time to time be deposited therein to fall directly into the water. Every such receptacle shall be provided with a suitable trap, having a water seal of not less than one and a half inches.
No container or other similar fitting shall be constructed or fixed under such receptacle No trap of the kind known as the D trap shall be constructed or fixed in connection with any such water-closet or urinal appara.us.
41. No water-closet or urinal apparatus or receptacle shall be directly connected with any water service pipe.
42. No flush-pipe connecting any water-closet apparatus with the cistern shall be less than one and a quarter inches in diameter and no flush-pipe in connection with
any urinal shall be less than three quarters of an inch in diameter.
43. No water-closet or urinal apparatus or receptacle shall be cased in.
44. Every water-closet and urinal shall be provided with an efficient soil-pipe of cast or wrought iron securely fixed to the wall in the manner described for ventilating and waste pipes; and such soil-pipe shall be at least four inches in diameter in the case of water- closets and at least two inches in diameter in the case of urinals, and shall be properly connected to the drain at the foot, and shall be continued up in full diameter without bends or
angles except where unavoidable, and shall terminate in an open end at least three feet in height above the caves of the building to which it is affixed or of any adjacent building and not less than ten feet from any window.
Such soil-pipe shall be jointed with yarn and molten lead and well caulked. Every soil-pipe shall be provided with proper junctions for connecting with the water-closet or urinal receptacle, the trap of which shall be connected in a sound and substantial manner. No soil-pipe shall receive any pipe other than that from a water-closet apparatus or urinal, and no trap shall be fixed in any portion thereof.
Every soil-pipe shall be fixed throughout its entire length outside the building in the
pen air.
45. When more than one trap from a water-closet or urinal receptacle is connected with a soil-pipe, the trap of each and every such receptacle shall be provided with an air- pipe not less than one and a quarter inches in diameter, which shall be carried up through- out its entire length outside the building, and shall either be connected to the soil-pipe above the connection with the uppermost trap or shall terminate not less than three feet above the eaves of the building and not less than ten feet from any window.
46. All joints, pipes, fittings and apparatus in connection with any water-closet or urinal shall be perfectly watertight and air-tight, and fixed to the satisfaction of the Building Authority.
47. All drains, sewers and drainage works, shall be built and carried out in all respects in accordance with the provisions of the Public Health and Buildings Ordinances, 1903- 1909, and of these regulations and of any that may be made hereafter, and if no written notice provided by No. 1 of these regulations shall have been given to the Building Autho- rity by any owner or occupier about to construct, re-construct, alter, repair or amend any drain or sewer on his premises, and if by such default the Building Authority shall have had no opportunity of inspecting and approving or disapproving of any such drain, sewer or drainage works actually built and already covered in, it shall be lawful for the Building Authority on discovering the existence of such drain or drainage works to call upon or occupier to open and uncover the same for the purpose of inspection, and should such drain, sewer or drainage works prove upon inspection to be defective either in respect of design, workmanship or materials they shall be deemed a nuisance under Part * III of the afore-mentioned Ordinances and dealt with accordingly.
such owner
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