【法规名称】
【法规编号】 79793 什么是编号？
【正 文】
第10页 CAP 123I BUILDING (STANDARDS OF SANITARY FITMENTS, PLUMBING, DRAINAGE WORKS AND LATRINES) REGULATIONS
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[接上页] (2) All drains and sewers shall be supported along the full length of the barrels and not by the sockets. (3) Where any drain or sewer is laid in soft and yielding ground- (a) adequate support shall be provided for such drain or sewer; and (b) save where the same are provided for the carriage of sub-soil water, the pipes shall be completely surrounded by at least 100 mm of concrete. (L.N. 294 of 1976)(4) Cast iron pipes above the ground may be carried on adequate piers or other sufficient supports, if such support is provided at each joint. Cap 123I reg 47A Drains and sewers in gathering grounds to be watertight (1) Every drain or sewer provided for the carriage of foul water from any building which lies within a gathering ground shall be watertight and shall- (a) be laid in pipes of cast iron or other approved material and be of such design and construction as to be capable of resisting the pressure to which it is likely to be subjected; (b) have any hatch box constructed on the drain or sewer so that the hatch box is capable of resisting the pressure to which it is likely to be subjected; and (c) have every joint in the drain or sewer made in lead, or other approved material so as to render the drain or sewer capable of resisting the pressure to which the drain or sewer is likely to be subjected.(2) Every joint in a drain or sewer referred to in paragraph (1) shall be made by bolting the flanges together securely with suitable metallic or asbestos gaskets or shall be of such other approved construction so as to render the drain or sewer capable of resisting the pressures to which the drain or sewer is likely to be subjected. (3) Hatch boxes shall be provided to a drain or sewer referred to in paragraph (1)- (a) at intervals not exceeding 30 m in the drain or sewer; (b) at changes of gradient, if the Building Authority so requires; and (c) at every change in direction in the drain or sewer: Provided that no hatch box is required where the change in direction does not exceed 10 degrees and is made by means of a purpose-made bend.(4) Notwithstanding paragraph (3), not more than one manhole shall be permitted in each drain or sewer. (5) Every hatch box shall be constructed of cast iron or other approved material and shall have a hatch or door securely bolted at the top thereof. (6) In this regulation- "gathering ground" (集水区) has the same meaning as in the Waterworks Ordinance (Cap 102); "hatch box" (检查箱) means a chamber of such a size and form as readily allows inspection and testing of the drain or sewer on which it is constructed and the clearance of obstructions from the drain or sewer. (L.N. 361 of 1980) Cap 123I reg 48 Falls of drains Every drain or private sewer shall be laid with a minimum fall from its highest inlet to its connection with a public sewer or other outlet in accordance with Table XII below. TABLE XII Diameter of pipe Fall 100 mm 150 mm 225 mm 300 mm 1 in 40 1 in 70 1 in 100 1 in 150 (L.N. 294 of 1976) Cap 123I reg 49 Junctions of drains (1) The junction of a single branch drain with another drain at an angle of not more than 45 degrees in the direction of flow may be made by means of a purpose-made Y junction. (2) The junction of every other branch drain with another drain shall be made within a manhole, obliquely at an angle of not more than 60 degrees in the direction of flow of such other drain, and shall be above the invert of such other drain. Cap 123I reg 50 Joints (1) Every joint in a drain or sewer shall be made in a proper and efficient manner so as to render the drain or sewer watertight and capable of resisting a pressure of a head of water of- (a) 1.5m; or (L.N. 294 of 1976) (b) the vertical distance between the invert level of the pipe joint and the level of the top of the manhole immediately preceding the joint,whichever is the greater, and no material forming any such joint shall project into the interior of any pipe in such manner as to cause any obstruction in the drain or sewer. (L.N. 361 of 1980) (2) The joints of cast iron socketed pipes shall be made with a gasket of hemp or yarn, and shall be properly caulked with metallic lead or other approved material. (3) The joints of cast iron flanged pipes shall be made by bolting the flanges together securely with a suitable metallic or asbestos gasket. (4) The joints of earthenware, stone ware or concrete pipes shall be made with a gasket of hemp or yarn, and cement mortar or other approved material. Cap 123I reg 51 Inlets to drains (1) Subject to paragraph (2), every inlet to a drain or sewer shall be properly trapped by an efficient trap, which shall be so formed and fixed as to maintain a water seal of not less than 75 mm. (2) Paragraph (1) shall not apply- (a) to an inlet for a soil pipe or a ventilating pipe; (b) to an inlet for the carriage of any trade effluent; (c) where no other means of connection is practicable; or (d) to an inlet to a drain used solely for the conveyance of rain water from a roof. |
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