# Motor Vehicles (Construction and Use) Regulations (Northern Ireland) 1999, Paragraph 5: Unions and joints


(1) Unions and joints on a pipeline or gas container shall be so constructed and fitted that they will—
(a) not be liable to work loose or leak when in use, and
(b) be readily accessible for inspection and maintenance.
(2) A union on a high pressure pipeline or on a gas container shall be made of suitable metal but such a union may contain non-metal washers and seals provided that such washers and seals are supported and constrained by metal components.

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Source: https://www.legislation.gov.uk/nisr/1999/454/schedule/5/paragraph/5 (the official version)
Page: https://openlegislation.uk/motor-vehicles-construction-and-use-regulations-northern-ireland-1999/schedule-5/paragraph-5
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.