BS 750:2012 Specification for underground fire hydrants and surface box frames and covers. Specifies the operational and health and safety requirements for underground fire hydrants that are to be installed in a water supply system, in size DN 80, are suitable for a maximum allowable operating pressure (PFA) of 1.6 MPa or 2.5 MPa (16 bar or 25 bar), with operating valves and with one outlet. Also covers requirements for the surface box frames and covers. Supersedes BS 750:2006. Came into effect 30 September 2012. First published August 1937. First revision January 1950. Second revision August 1964. Third revision February 1977. Fourth revision January 1984. Fifth revision September 2006. Sixth revision (present) September 2012.
