BS 746:2014 - Specification for gas meter unions and adaptors
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BS 746:2014

Specification for gas meter unions and adaptors

Status : Current, Under review   Published : November 2014



This British Standard specifies requirements and test methods for unions and adaptors for the installation of low pressure gas meters. It is applicable to unions and adaptors for gas meters for use with 1st, 2nd and 3rd family gases at temperatures between -20 °C and +60 °C, up to a maximum operating pressure of 75 mbar 1) and a maximum incidental pressure of 200 mbar. The gas tightness of the gas meter unions and adaptors is also specified.


The tests specified in this standard are type tests, except for that specified in 4.2.3.

Standard NumberBS 746:2014
TitleSpecification for gas meter unions and adaptors
StatusCurrent, Under review
Publication Date30 November 2014
Confirm Date18 February 2020
Normative References(Required to achieve compliance to this standard)BS EN 1562:2019, BS EN 549:2019, BS EN 10088-3:2005, BS EN 1982:2017, BS EN 12329:2000, PD 970, BS EN 12167, BS EN 1652, BS EN 12165, BS EN ISO 27830, BS EN 12168, BS EN 1976, BS 7371-6, BS 1936-1, BS EN 12420, BS EN 10242, BS EN 12164
Informative References(Provided for Information)The Building Regulations 2000, The Building (Scotland) Regulations 2004, The Gas Safety (Management) Regulations 1996, The Gas Safety (Installation and Use) Regulations 1998, The Building Regulations (Northern Ireland) 2000, The Gas (Meters) Regulations 1983, BS EN 14236:2018, BS EN 1359:2017
ReplacesBS 746:2005+A1:2009
Draft Superseded By12/30243876 DC
DescriptorsPressure testing, Size, Washers, Dimensions, Pipe fittings, Threads, Nuts, Bosses, Liners (mechanical components), Gas-supply meters, Unions, Pipe connections, Screwed fittings, Pipe couplings
ISBN978 0 580 74892 9
File Size719 KB

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