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WIS 4-23-04 Issue 1 Specification for underground stop valves, including spherical valves, for potable water services for nominal sizes up to and including 63 and nominal pressures of 10 bar minimum and made principally of metal or thermoplastics

This specification stipulates the quality assurance, water quality, performance, quality control and marking requirements for underground plug cocks for cold potable water services to BS 2580 as well as underground stop valves for water services to BS 5433. It also stipulates the performance and quality control requirements for screw down valves and plug valves made principally of a thermoplastics material as well as for spherical valves made principally of metal or a thermoplastics material.


The document has not been reviewed for its continued currency since publication.

A number of the other WIS referenced (e.g. WIS 4-32-04; WIS 4-32-06; WIS 4-32-07) have been withdrawn.

One or more ‘Common Editorial Caveats’ apply – see ‘WIS & IGN Library / Navigation & Caveats’ for details.

Based on the Standards Board’s enquiries of stakeholders (Autumn 2021) the consensus view is that the existing document is likely to require updating. The Board has therefore initiated a review of its continuing relevance and currency.

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