• Material change of use

    Means a change in the purpose for which, or the circumstances in which, premises are used, such that after that change the premises are used (where previously they were not so used)– (i) as a dwelling; (ii) as an institution; (iii) read more

  • Maximum level

    The highest physical or piezometric level of the fluid reached in any part of the receptacle when operated continuously under fault conditions. Interpretation given in Regulators’ Backflow Specification - backflow prevention arrangements read more