(3) In this regulation, means land which can allotment be disposed of separately under section 8A of the of Land Act 1962 without being subdivided. 21 Devices in consumer piping r. 21 (1) For the purposes of section 72(1) of the Act, it is a prescribed requirement for the carrying out of gasfitting work that when a gas pressure raising device or a mixing device is being installed in consumer piping the gas supply and meter are protected from low pressure, pulsation or reverse flow conditions. (2) For the purposes of section 72(1) of the Act, it is a prescribed requirement for the carrying out of gasfitting work that when a mixing device is being installed in consumer piping the gas supply and meter are protected from the admission of compressed air or other gaseous substance. (3) In this regulation, means a device mixing device for mixing gas with compressed air or any other gaseous substance. 22 Safety of installation (1) For the purposes of section 72(2) of the Act, it is a prescribed requirement for the carrying out of gasfitting work on a gas installation that— gas installation not be made unsafe during the gasfitting work; and
(3) In this regulation, allotment means land which can be disposed of separately under section 8A of the of Land Act 1962 without being subdivided. 21 Devices in consumer piping r. 21 (1) For the purposes of section 72(1) of the Act, it is a prescribed requirement for the carrying out of gasfitting work that when a gas pressure raising device or a mixing device is being installed in consumer piping the gas supply and meter are protected from low pressure, pulsation or reverse flow conditions. (2) For the purposes of section 72(1) of the Act, it is a prescribed requirement for the carrying out of gasfitting work that when a mixing device is being installed in consumer piping the gas supply and meter are protected from the admission of compressed air or other gaseous substance. (3) In this regulation, mixing device means a device for mixing gas with compressed air or any other gaseous substance. 22 Safety of installation (1) For the purposes of section 72(2) of the Act, it is a prescribed requirement for the carrying out of gasfitting work on a gas installation that— gas installation not be made unsafe during the gasfitting work; and