ORDINANCE No. 13 OF 1901.
Public Health.
It is essential where water-closets are used, or where the drains receive excrementitious matter. In the case of a short length of drain, leading from a single inlet, placed in an open space, such as a back-yard, though desirable, it is less necessary and may be omitted without serious danger.
Any direct communication between the interior of the house and the house-drain should be avoided. Pipes carrying water from baths or sinks, within the dwelling, should therefore deliver their effluent above trapped gulleys in the open air. The effluent from baths or sinks, on upper storeys should, whenever practicable, be received by open-topped pipes, delivering freely above trapped gulleys at or a little below the ground-level. If, as in the case of water-closets, a direct communication has to be made between a fitting inside the house and the drain, then there must be complete ventilation by means of a pipe carried up outside and to the top of the building.
Drainage Bye-laws.
1. Any owner or occupier of private premises about to construct, reconstruct, alter or amend any drain shall give at least seven days' previous written notice of such intention to the Board, 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.
2. Every such notice shall specify the name of the street, the number of the lot and the number of the house, if any, which it is intended to drain, and shall be accompanied by a plan in duplicate of the premises drawn on a scale of not less than twenty feet to the inch, and such plan must show the whole of the drains with their proposed sizes figured thereon, and a section or sections showing the proposed falls or inclination and drawn to the same scale and to a vertical scale of not less than ten feet to the inch. The plan must also show the position and course of all proposed surface gutters.
Except that in case of suburban lots which cannot be conveniently included within a plan of ordinary dimensions, when the lot and the out-fall drain may be shown on a scale of not less than one hundred feet to the inch.
3. Within seven days after receipt of the notice, the Sanitary Surveyor shall, by means of a written communication, in English or Chinese as may be necessary, inform the person who has given the said notice whether his designs and proposed mode of construction are approved or disapproved, and in case of disapproval such modifications or improvements as may be requisite in order to comply with the provisions of The Public Health Ordinance, 1901, and of any bye-laws made thereunder shall be indicated in detail to such person by the Sanitary Surveyor, and it shall not be lawful for such person to commence the drainage works until the approval thereto of the Sanitary Surveyor shall have been previously obtained by him, and in the case of such approval one copy of the deposited plan shall be returned to him, and the remaining copy shall remain filed in the Office of the Sanitary Surveyor.
NOTE--The approval of plans conveyed by the Sanitary Surveyor under this bye-law certifies simply to the fact that the plans are in accordance with the Public Health Ordinance and with the bye-laws made thereunder, but signifies no approval of the sufficiency or otherwise of the plant and throws no responsibility on the Board.
4. Any person carrying out excavations for drainage works on any premises contiguous to a public thoroughfare, whereby the safety of the public may be jeopardized, shall light such excavations by means of a lantern or lanterns kept lighted through the night, and he shall further provide watchmen, erect hoardings and otherwise take such precautions as may be necessary for securing the safety of the public and the protection of adjoining properties.
5. House-drains shall be made of impervious materials with smooth internal surfaces, such as well-glazed earthen-ware pipes or cast-iron pipes protected against rust or corrosion by suitable asphaltic coating. The drains shall be so constructed as to be water and air-tight. In jointing pipes with cement, tarred-hemp shall be caulked into the joint before the cement is applied, and care shall be taken that no cement or other jointing material projects from the joints into the interior of the pipes; and any such projecting material or other irregularities in the bore of the drain shall be carefully removed.
6. House-drains shall be firmly bedded in selected material free from large stones and well rammed into place.
7. All stoneware pipes shall be well-glazed and free from cracks and flaws and shall have a thickness of not less than one-twelfth of their diameter.
8. Disconnecting chambers shall be red brick manholes lined with stoneware traps and ventilating grates of iron or stone.
9. Lime mortar used for the building of manholes shall be composed of three parts of sand or red earth and one part of good lime.
10. Lime concrete used for encasing drains shall be composed of four parts of good sound clean stone, broken to half-inch cubes, two parts of red earth and one part of lime thoroughly well mixed and well rammed into place.
11. Cement mortar used for the jointing of pipes or any other work shall be mixed in the proportions of three parts of clean sharp sand and one part of good Portland cement and used fresh.
12. No main house-drain shall be less than six inches in clear internal diameter.
13. Subject to the limitation mentioned in the preceding bye-law, no main house-drain shall be larger than is necessary in the opinion of the Board to carry off the sewage of the dwelling, or the sewage with the rain-water, which, under conditions hereinafter specified in Nos. 38, 39, 40 and 41 of these bye-laws shall be admitted to the house-drain.
14. Every house-drain shall have the maximum fall, throughout its length, that the relative levels of the public sewer and of the most remote inlet, will admit of.
Provided always:
(a) That the maximum available fall does not exceed one in thirty (or 4 inches in 10 feet). If it does, then the part of the drain, more remote from the public sewer, may be laid with a fall of one in thirty; and the remainder, with such greater fall as may be necessary to connect with the public sewer.
(b) That the excavation, necessary to obtain the maximum available fall, is not of such a nature as to endanger the stability of the adjoining or neighbouring property.
In these and similar cases the gradient may be reduced subject to the approval of the Board.
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ORDINANCE No. 13 or 1901.
Public Health.
It is essential where water-closets are usel, or where the drains receive excrementitious matter. In the case of a short length of drain, leading from a single inlet, placed in an open space, such as a back-yard, though desirable, it is less necessary ani may be omitted without serious danger.
R. Any direct communication between the interior of the house nl the house-drain should be avoided. Pipes carrying water from baths or sinks, within the dwelling, should therefore deliver their effluent above trapped gulleys in the open air. The cfluent from baths or sinks, on upper storeys should, whenever practicable. be received by open-topper pipes, delivering freely above trapped guileys at or a little below the ground-level. If, as in the case of water-cluzels, a direct communication has to be made between a fitting inside the house and the drain, then there raust be complete ventilation by means of a pipe carried up outside and to the top ef the building.
Drainage Bye-lawr.
1. Any owner or occupier of private premises about to construei reconstruct, alter or amend any drain shafi give at least seven days' previous written notice of such intention to the Board, and sach 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 2.4 of (88) cut the villages, at any village Police Station between the hours of 10
Ondan amat
a.m. and 4 pm.
2. Every such notice shall specify the name of the street, the num her of the lot and the number of the house, if any, which it is intend ed to drain, and shall be accompanied by a plan in duplicate of the premises drawn on a scale of not less than twenty feet to the inch, and such plan must show the whole of the drains with their pro posed sizes figured thereon, and a section or sections showing the proposed falls or inclination and drawn to the same scale and to a vertical scale of not less than ten feet to the inch. The plan must also show the position and course of all proposed surface gutters.
Except that in case of suburban lots which cannot be conveniently included within a plan of ordinary diniensions, when the lot and the out-fall drain may be shown on a scale of not less than one hundred feet to the inch.
3. Within seven days after receipt of the notice, the Sanitary Surveyor shall, by means of a written communication, in English or Chinese as may be necessary, inform the person who has given the said notice whether his designs and proposed mode of construction are approved or disapproved, and in case of disapproval such mati fications or improvements as may be requisite in order to comply with the provisions of The Public Health Ordinance, 1901, and of any by laws made thereunder shall be indicated in detail to such person by the Sanitary Surveyor, and it shall not be lawful for such person to commence the drainage works until the approval thereto of the Sant tary Surveyor shall have been previously obtained by him, and in the case of such approval one copy of the deposited plan shall be re- turned to him, and the remaining copy shall remain filed in the Office of the Sanitary Surveyor.
NOTE--The approval of plans conveyed by the Sanitary Surveyor under tiss bre law certides suply to the fact that the plans are in accordance with the Public Health Ordinance and with the bye-laws made thereunder, but signides no approval of the sufficiency or otherwise of the plant and throws ng responsibility on the Board.
ORDINANCE No. 13 OF 1901.
Public Health.
4. Any person carrying out excavations for drainage works on any preinises contiguous to a public thoroughfare, whereby the safety of the public may be jeopardized, shall light such excavations by means of a lantern or lanteras kept lighted through the night, and he shall further provide watchmen, erect hoardings and otherwise take such precautions as may be necessary for securing the safety of the public and the protection of adjoining properties.
5. House-drains shall be made of impervious materials with smooth internal surfaces, sach as well glazed earthen-ware pipes or rast-iron pipes protected against rust or corrosion by suitable asphal- dic coating. The drains shall be so constructed as to be water and air-tight. In jointing pipes with cement, tarred-hemp shall be caulk ed into the joint before the cement is applied, and care shall be taken that no cement or other jointing material projects from the joints into the interior of the pipes; and any such projecting material or orher irregularities in the bore of the drain shall be carefully removed.
6. House-drains shall be firmly bedded in selected material free from large stones and well rammed into place.
7. All stoneware pipes shall be well glazed and free fron cracks and flaws and shall have a thickness of not less than one-twelfth of their diameter.
8. Disconnecting chambers shall be red brick manholes hired with stoneware traps and ventilating grates of iron or stone,
9. Lime mortar used for the building of manholes shall be com posed of three parts of sand or red earth and one part of good lime.
10. Lime concrete used for encasing drains shall be composed of four parts of good sound clean stone, broken to half inch cubes, two parts of red earth and one part of line thoroughly weil mixed and well rammed into place.
U. Cement mortar used for the jointing of pipus or any other work shall be mixed in the proportions of three parts of clean sharp sand and one part of good Portland cement and used fresh.
12. No main house-drain shall be less than six inches in clear internal diameter.
13. Subject to the limitation mentioned in the preceding bye-law, no main house-drain shall be larger than is necessary in the opinion of the Board to carry off the sewage of the dwelling, or the sewage with the rain-water, which, under conditions hereinafter specified in Nos. 38, 39, 40 and 41 of these bye-laws shall be admitted to the house-drain.
14. Every house-drain shall have the maximum fall, throughout its length, that the relative levels of the public sewer and of the most remote inlet, will admit of
Provided always
faj That the maximum available fall does not exceed one in thirty (or 4 inches in to feet). If it does, then the part of the drain, more remote from the public sewer, may be laid with a fall of one in thirty; and the remainder, with such greater fall as may be necessary to connect with the pub- lic sewer.
(b) That the excavation, necessary to obtain the maximum avail- able fall, is not of such a nature as to endanger the sta bility of the adjoining or neighbouring property.
In these and similar cases the gradient may be reduced subject to the approval of the Board.
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