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Thanks IJWS15, I've taken your advice and looked at the info published by Transo. This is taken from here: http://www.nationalgrid.com/NR/rdonlyres/7DC3282C-33DE-46A6-B697-152DEFECBA85/1118/3eb1.doc 3.7 Shallow Depth Services 3.7.1 The service pipe should normally be laid at a...

Hi Iain, This is taken from HSE guidelines Design, construction and installation of gas service pipes Pipelines Safety Regulations 1996 Approved Code of Practice and guidance, which can be found here: http://www.hse.gov.uk/pubns/priced/l81.pdf 16 Service pipes should be routed...