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WISs and IGNs

Current Water Industry Specifications (WISs) and Information and Guidance Notes (IGNs) are managed by Water UK and available here.

Water Industry Specifications (WISs) are prepared by the UK water industry for the specification and purchase of products used in the industry. They generally cover products for which there is no suitable European or British standard.

Information & Guidance Notes (IGNs) are used to provide additional guidance to a WIS or provide interpretation and additional information to European or British standards.

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WIS and IGN

Fine to Flush

  • Type: WIS
  • Code: 4-02-06
  • Issue: Specification for a testing methodology to determine whether a product is suitable for disposal through a drain or sewer system
  • Status: Current
WIS and IGN

Use of steel tanks in the water industry

  • Type: WIS
  • Code: 4-25-01
  • Issue: October 1999
  • Status: Current
WIS and IGN

Thermoplastic end load resistant mechanical fittings for polyethylene pipes of nominal size

  • Type: WIS
  • Code: 4-32-11
  • Issue: July 1998
  • Status: Current
WIS and IGN

Operational requirements: in situ resin lining of water mains

  • Type: WIS
  • Code: 4-02-01
  • Issue: October 2014
  • Status: Current
WIS and IGN

Applications for stainless steel in the water industry

  • Type: IGN
  • Code: 4-25-02
  • Issue: January 1999
  • Status: Current
WIS and IGN

Operating guidelines for the use of site, factory and reinforced applied polyethylene sleeving on ductile iron pipelines

  • Type: IGN
  • Code: 4-50-03
  • Issue: June 1996
  • Status: Current
WIS and IGN

Polyester resin concrete (PRC) sewer linings

  • Type: WIS
  • Code: 4-34-05
  • Issue: April 1986
  • Status: Current
WIS and IGN

Mechanical couplings and repair clamps for iron pipes for the conveyance of cold potable water (underground use) for the size range 40 to 1600mm

  • Type: WIS
  • Code: 4-21-02
  • Issue: October 1994
  • Status: Current
WIS and IGN

The determination of end-loads for the performance testing of pipeline fittings

  • Type: IGN
  • Code: 4-01-02
  • Issue: December 2017 Issue 3
  • Status: Current
WIS and IGN

Specification for Package Pumping Stations Intended to Serve More Than One Property

  • Type: WIS
  • Code: 4-04-02
  • Issue: December 2012
  • Status: Current