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>BSI Standards >91 CONSTRUCTION MATERIALS AND BUILDING>91.140 Installations in buildings>91.140.70 Sanitary installations>BS 1125:1987 Specification for WC flushing cisterns (including dual flush cisterns and flush pipes)
immediate downloadReleased: 1987-03-31
BS 1125:1987 Specification for WC flushing cisterns (including dual flush cisterns and flush pipes)

BS 1125:1987

Specification for WC flushing cisterns (including dual flush cisterns and flush pipes)

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Standard number:BS 1125:1987
Pages:18
Released:1987-03-31
ISBN:0 580 15742 3
Status:Standard
DESCRIPTION

BS 1125:1987


This standard BS 1125:1987 Specification for WC flushing cisterns (including dual flush cisterns and flush pipes) is classified in these ICS categories:
  • 91.140.70 Sanitary installations

BS 1125 specifies requirements for WC flushing cisterns with valveless siphons, nominally 9 L (litres), for high level, low level and close coupled positions, together with the necessary flush pipes.

The cisterns specified are of the type which flushes 9 L only, (i.e. the single flush type), or of the type which flushes, as selected, either 4.5 L or 9 L, (i.e. the dual flush type).

Float operated valves and methods of fixing are not covered by BS 1125.

NOTE 1 Dual flush type cisterns are intended for use with washdown pans in domestic premises only.

NOTE 2 The titles of the publications referred to in this standard are listed on the inside back cover.


Cisterns with valveless siphons, nominally 9 litres, for high level, low level and close coupled positions, in both ceramic and plastics.