Water Supply Industry Interpretations and Advice

  • Area of Interest : Installation
  • Topic : Copper pipe
  • Title : Installation of copper pipe below ground
  • Clause Reference : Regulation 4(1)(b)
  • Reference Number : I33
  • Decision Date : January 2012

Following the withdrawal of BS 2871 Part 1 copper tube is no longer categorised as Table X, Table Y and Table W. Its replacement BS EN 1057 no longer categorises, or tables, copper tube but specifies outside diameter and temper designation.

The specifications listed below have been identified by the WRAS Technical Committee as being equivalent to Table Y and therefore suitable for installation below ground.

Copper soft coils
12mm (tube size) x 0.8mm (wall thickness) EN 1057 - R220 (tensile strength)
15mm (tube size) x 1.0mm (wall thickness) EN 1057 - R220 (tensile strength)
22mm (tube size) x 1.2mm (wall thickness) EN 1057 - R220 (tensile strength)
28mm (tube size) x 1.2mm (wall thickness) EN 1057 - R220 (tensile strength)

Copper half hard straight lengths
6mm (tube size) x 0.8mm (wall thickness) EN 1057 - R250 (tensile strength)
8mm (tube size) x 0.8mm (wall thickness) EN 1057 - R250 (tensile strength)
10mm (tube size) x 0.8mm (wall thickness) EN 1057 - R250 (tensile strength)
12mm (tube size) x 0.8mm (wall thickness) EN 1057 - R250 (tensile strength)
15mm (tube size) x 1.0mm (wall thickness) EN 1057 - R250 (tensile strength)
22mm (tube size) x 1.2mm (wall thickness) EN 1057 - R250 (tensile strength)
28mm (tube size) x 1.2mm (wall thickness) EN 1057 - R250 (tensile strength)
35mm (tube size) x 1.5mm (wall thickness) EN 1057 - R250 (tensile strength)
42mm (tube size) x 1.5mm (wall thickness) EN 1057 - R250 (tensile strength)
54mm (tube size) x 2.0mm (wall thickness) EN 1057 - R250 (tensile strength)
67mm (tube size) x 2.0mm (wall thickness) EN 1057 - R290 (tensile strength)*
76mm (tube size) x 2.0mm (wall thickness) EN 1057 - R290 (tensile strength)*
108mm (tube size) x 2.5mm (wall thickness) EN 1057 - R290 (tensile strength)*

*to be used with soldered or welded fittings only