(1) Every water-closet, urinal or slop-hopper shall be flushed by means of an approved flushing-valve or a flushing cistern complying with S.A.B.S. 497, or with S.A.B.S 821, W.C. flushing cisterns.

(2) When coupled to a wash-down pan, the cistern shall have the following maximum flushing-times-

High-level cistern Low-level cistern

9,1 litres: 6 seconds 9,1 litres: 7 seconds
11,4 litres: 7,5 seconds 11,4 litres: 8,5 seconds
13,6 litres: 8,5 seconds 13,6 litres: 10 seconds

(3) Such cisterns, other than the automatic-discharge type, shall be fitted with an approved water-waste preventer-valve or siphon and with a ball-valve complying with S.A.B.S. 752, Ballvalves.

(4) The overflow pipe shall terminate in a position, to the approval of the local authority, where an overflow can be readily noticed and will not result in damage to the building.