Waterworks Clauses Act 1952

Any person acting under the authority of the undertakers may, at any reasonable time, by night or day, enter into any house or place supplied with water under the authority of this Act or the special Act to see if there is any waste or misuse of water, and the condition or state of repair of the pipes or works by which the water is supplied to that house or place, and may, for the latter purpose, break the surface of the ground under which the pipes are laid; and if that person is at any such time refused admission into the house or place, or is prevented from making his examination, the undertakers may turn off the water from that house or place.