Hong Kong Regulations

BUILDING (STANDARDS OF SANITARY FITMENTS, PLUMBING, DRAINAGE WORKS AND LATRINES) REGULATIONS - REGULATION 27

Waste pipes

(1) Waste pipes to which the waste from one waste fitment is discharge shall
have an internal diameter of not less than-

   (a)  32 mm; or (L.N. 294 of 1976)

   (b)  the internal diameter of the outlet of the trap to which the
        waste pipe is connected, whichever is the greater.

(2) Waste pipes to which the waste from more than one fitment is discharged
shall be of adequate diameter to convey all such waste.

(3) Every waste pipe shall terminate at its lower end not more than 150 mm
above the channel or trapped gully over or into which it discharges. (L.N. 294
of 1976)