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  • BSI
    BS 3251:1976 Specification. Indicator plates for fire hydrants and emergency water supplies
    Edition: 1976
    $316.70
    / user per year

Description of BS 3251:1976 1976

This British Standard specifies requirements for hydrant, emergency water supply and meter bypass indicator plates made from sheet steel, cast iron, aluminium alloy or plastics materials, together with all removable characters and spacer pieces supplied with them.

Four types of plate are specified.

  1. Class A plates: hydrant indicator plates for general use except on roads of motorway standard.
  2. Class B plates: hydrant indicator plates for use on roads of motorway standard.
  3. Class C plates: indicator plates for emergency water supplies, “EWS”.
  4. Class D plates: indicator plates for meter bypass valves.


Dimensions for sheet steel, cast iron, aluminium alloy or plastics indicator plates. Colours and finish, tests for impact resistance, colour stability, resistance to weathering, flexibility and security of removable numerals. Recommendations for fixing.

About BSI

BSI Group, also known as the British Standards Institution is the national standards body of the United Kingdom. BSI produces technical standards on a wide range of products and services and also supplies certification and standards-related services to businesses.

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