# Regulation (EU) No 540/2014 of the European Parliament and of the Council of 16 April 2014 on the sound level of motor vehicles and of replacement silencing systems, and amending Directive 2007/46/EC and repealing Directive 70/157/EEC (Text with EEA relevance), Appendix 5: Measuring points — back pressure

Extent: E+W+S+N.I.

Examples of possible measuring points for loss-of-pressure tests. The exact measuring point shall be specified in the test report. It shall be in an area where gas flow is regular.
1.
Figure 1
Single pipe
2.
Figure 2
Partly twin pipe 1
1 If not possible, refer to figure 3.
3.
Figure 3
Twin pipe
2 Two measuring points, one reading.

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Source: https://www.legislation.gov.uk/eur/2014/540/annex/IX/appendix/5 (the official version)
Page: https://openlegislation.uk/eu-regulation-2014-540/annex-IX/appendix-5
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.