Hong Kong Regulations

MERCHANT SHIPPING (SEAFARERS) (CREW ACCOMMODATION) REGULATION - SECT 18

Drainage

(1) The crew accommodation shall be efficiently drained. In particular-

   (a)  drainage pipes and channels shall be provided wherever necessary to
        clear water shipped from the sea; and

   (b)  in order to preclude effluvia from the crew accommodation the soil and
        other waste water drainage system shall be so arranged and fitted with
        such water seals, air vents and storm valves as are necessary to
        prevent siphonage or blow-back.

(2) Each space in the sanitary accommodation (except private  bathrooms) and
each laundry shall be served by one or more scuppers which do not serve any
space other than sanitary accommodation or another laundry. The scuppers shall
be at least 50 millimetres in diameter, and shall be placed wherever water is
likely to collect on the floor.

(3) There shall be no drainage into sanitary accommodation from any source
outside that accommodation except other sanitary accommodation. (Enacted 1995)