General

Specification for the audit of water industry risk assessments and risk management processes
Type: WIS
Code: 4-01-04​
Issue: March 2018 Issue 1
Status: Current
Document: WIS 4-01-04

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
Document: IGN 4-01-02.pdf

Operational requirements: In situ polymeric lining of service pipes

Type: WIS
​Code: 4-02-03
Issue: November 2016 Version 1
Status: Current
Document: WIS 4-02-03

Pressure testing of pressure pipes and fittings for use by public water suppliers

Type: IGN
Code: 4-01-03
Issue: October 2015 Issue 2
Status: Current
Document: IGN 4-01-03.pdf

Information and guidance for the development and amendment of specifications and guidance notes for the water industry
Type: IGN
Code: 4-00-02
Issue: 2015 Issue 8.1
Status: Current
Document: IGN 4-00-02

Guidance on allocation and calculation of costs for self lay of water mains
Type: IGN
Code: 4-05-01
Issue: 2014 Issue 1.0
Status: Current
Document: IGN 4-05-01

Code of practice: in situ resin lining of water mains
Type: IGN
Code: 4-02-02
Issue: October 2014
Status: Current
Document: IGN 4-02-02v4.3

Operational requirements: in situ resin lining of water mains
Type: WIS
Code: 4-02-01
Issue: October 2014
Status: Current
Document: WIS 4-02-01v7.3

Specification for Package Pumping Stations Intended to Serve More Than One Property
Type: WIS
Code: 4-04-02
Issue: December 2012
Status: Current
Document: WIS 4-04-02

Specification for TYPE 1 Package Pumping Stations Comprising a Pumping Assembly Installed in a Dry Chamber and Intended to Serve More Than One Property
Type: WIS
Code: 4-04-01
Issue: December 2012
Status: Current
Document: WIS 4-04-01

Bedding and sidefill materials for buried pipelines
Type: IGN
Code: 4-08-01A
Issue: Amendment No. 1
Status: Current
Notes: Amendment November 2008
Document: IGN 4-08-01A v1 - Trew 11 Dec 08.pdf

Specification for bedding and sidefill materials for buried pipelines
Type: WIS
Code: 4-08-02A
Issue: Amendment No. 1
Status: Current
Notes: Amendment November 2008
Document: WIS 4-08-02A v1 - Trew 11 Dec 08.pdf

Imported granular and selected as-dug bedding and sidefill materials for buried pipelines
Type: IGN
Code: 4-08-01
Issue: February 1994
Status: Current
Document: IGN 4-08-01.pdf

Imported granular and selected as-dug bedding and sidefill materials for buried pipelines
Type: WIS
Code: 4-08-02
Issue: February 1994
Status: Current
Document: WIS 4-08-02.pdf