664120-1887-Bill-read-Public-Health — Page 8

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THE HONGKONG GOVERNMENT GAZETTE, 7TH MAY, 1887.

44. Every owner shall cause, every such drain to be of adequate size, such size to be approved by the Board, and in no case to be less than four inches internal diameter. Where the ground is soft, such drain shall be laid in a bed of good lime concrete. Every house-drain shall be laid with a proper fall to the satisfaction of the Board.

45. No drain shall be so constructed as to pass under any building, except in any case where any other mode or construction may be impracticable. Any drain passing under a building shall be laid in one straight line for the whole distance beneath such building, and shall be com- pletely embedded and encased all round in good and solid lime concrete, at least four inches thick all round.

46. Adequate disconnexion and ventilation shall be pro- vided at the end of every house-drain, by means of gully- traps, with slop-stone covers or suitable iron perforated covers or gratings, and ventilating pipes, placed at such points and levels, and in such manner as shall in each case be required by the Board, and every inlet to every house- drain, shall be properly trapped and shall be grated, or covered with a perforated stone or iron cover that shall effectually prevent the introduction of any solid substance into such inlet and the perforations or apertures of every such grating or cover, shall be of not less than the sectional area of the pipe or drain to which it is fitted.

47. Every drain from a building communicating directly with, any public sewer, shall be provided with a suitable trap, ventilating-grating, disconnecting manhole, or other appliance, to the satisfaction of the Board, at such point between such building and such public sewer as shall be pointed out in each case by the Board.

48. No house-drains shall be joined in such a manner as to form any right-angled junction, either vertical or hori- zontal. Every drain shall join. another drain obliquely in the direction of the flow of such drain.

49. No ventilating-pipe of any drain shall be of a less internal diameter than four inches, and such ventilating pipe shall in every case be securely fixed and so carried up to such height, (provided such height be in no case lesa than ten feet above the ground), as shall effectually prevent any escape of foul air into any thoroughfare or adjoining building.

50. No overflow from any cistern or bath, or ablution, sullage, or refuse waters of any kind, nor the surface- drainage of any yard or back-yard shall be led from any building or premises, through any down-pipe or open gutter into, or over, any surface-channel of any public street, alley, thoroughfare, or other ground, nor shall such refuse waters be led into, or emptied over the surface of any back- yard, alley, or other ground belonging to such building, or premises or other adjoining building or premises, but shall be conveyed in a watertight waste-pipe or down-pipe taken through an external wall, and discharged in the open air over a gully-trap covered with a grating or granite slop- stone cover, and no such waste-pipe or down-pipe, all be brought down any external wall or retaining wall when such wall looks upon any public thoroughfare.

51. Every kitchen of a dwelling or tenement-house, shall be provided on every floor with a suitably dished and perforated slop-stone, and with a down-pipe, securely fixed, trapped, disconnected, and ventilated to the satisfaction of the Board.

52. All works connected with the construction, discon- nexion, trapping and ventilating of house-drains, shall be carried out at the cost and charges of the owner of the house, either by the Board or by persons approved of by the Board under the supervision of the latter.

53. The Board may, by a written Notice, require the owners of existing buildings, the drains of which are in the opinion of the Board in a defective and insanitary condition, to construct within a reasonable time to be determined by the Board, new house-drains in accordance with the provisions of this Ordinance, or to make such other improvements in the existing defective drainage of such building, as in the opinion of the Board may be necessary to meet the requirements of this Ordinance.

54. If it appears to the Board that a group of con- tiguous tenements may be drained more advantageously in combination than separately, the Board may order that such group be drained upon some combined plan to be approved by it, and the expenses shall be apportioned by the Board between the different owners of such group of contiguous tenements.

Sizes and falls of drains.

Drains under building.

Disconnexion and

ventilation of drains.

Traps and taanholes.

Junction of drains.

Ventilating- Pipes.

Overflowe and waste waters.

Slop-stones and down-pipes.

All works to be carried out by Board or by persons approved by

same.

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Now house- drains.

Groups of drains.

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