Hong Kong Regulations

BUILDING (STANDARDS OF SANITARY FITMENTS, PLUMBING, DRAINAGE WORKS AND LATRINES) REGULATIONS - REGULATION 66

Construction

(1) Every septic tank shall-

   (a)  have a depth of at least 1.2 m but not more than 1.8 m from the invert
        of the inlet to the floor of the tank;

   (b)  have a length not less than 3 times but not more than 4 times its
        width;

   (c)  be provided with adequate means of access for the inspection and
        cleansing of each chamber. (L.N. 361 of 1980)

(2) The sides of every septic tank shall be constructed of-

   (a)  brickwork in cement mortar not less than 215 mm thick;

   (b)  concrete not less than 125 mm thick; or (L.N. 439 of 1990)

   (c)  other approved material.

(3) The foundation and floor of every septic tank shall be constructed of
concrete not less than 150 mm thick. (L.N. 439 of 1990)

(4) All internal faces (including the floor) of every septic tank shall be-

   (a)  rendered in cement mortar; or

   (b)  faced with other approved material, so as to provide a smooth,
        impervious surface. (L.N. 294 of 1976)