Hong Kong Regulations

BUILDING (STANDARDS OF SANITARY FITMENTS, PLUMBING, DRAINAGE WORKS AND LATRINES) REGULATIONS - REGULATION 54

Drains and sewers under buildings, etc.

(1) All drains and sewers under a building shall be laid in straight lines and
shall be laid with cast iron sewage pipes.

(2) Where any drain or sewer is laid through any building, or where any
building is constructed over any drain or sewer, relieving arches or beams
shall be provided to protect such drain or sewer and to prevent any load from
the building being transmitte d to such drain or sewer.