Regulation 4(1)(a) & 4(2): Overview

What is a water fitting of an appropriate quality and standard?

To help prevent contamination and waste of mains water supplies the water fittings regulations in England, Wales and Northern Ireland, byelaws in Scotland include specific requirements for water fittings. These include the legal requirement to be of an appropriate quality and standard for installation [regulation 4 (1)(a) & 4(2)].

This regulation requires water fittings, and water using appliances, to either:

  • Conform to an appropriate British Standard (or some other national specification which provides an equivalent level of protection and performance)


  • Conform to a specification approved by the regulators

If the water conveyed by these fittings needs to be wholesome – drinking water standard - any non-metallic materials or components within the fitting or appliance which comes into contact with water must also conform to the current version of BS 6920 (or an equivalent).

Any questions please contact the local water undertaker for advice.





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Uncontrolled if downloaded. This is informative, non-statutory guidance and intended for general guidance purposes only; it is subject to change.

Compliance with this information should not be relied upon as guaranteeing no enforcement action will be taken by water undertakers. Water Regs UK accepts no liability for loss, indirect or consequential loss arising from or in connection with this guidance document.