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An IWS representative will always be available to answer any questions and give advice, either by visiting your site, phone or e-mail.

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Our other services

Mechanical and Electrical Water Hygiene

RPZ Valves

Your business premises may have been inspected by a water company regulations inspector, who will have advised the installation of one or more RPZ valves in order to ensure your premises are water regulations compliant – and to safeguard the quality of drinking water in the area.


RPZ valves provide a low cost, viable alternative to the installation of break-feed cisterns, (water cisterns with built-in air gaps to prevent back-siphonage and contamination from water used for industrial processes).

There is a legal requirement that RPZ valve inspection, testing and certification is carried out on a minimum of an annual basis. This is to ensure the continued compliance of water installations, particularly where water is used in any process, with the Water Fittings Regulations (1999).

It is important to note that the purpose of these regulations is to prevent the misuse, waste, undue consumption or erroneous measurement of water and, most importantly of all, to prevent the contamination of drinking water.

Our expert teams provide a complete installation and inspection service, including:

RPZ valve procurement and supply

Valve installation services

Annual inspection and certification services by an accredited inspector

Management systems for quality, health and safety and the environment which are certificated to BS EN ISO 9001, BS OHSAS 18001 and BS EN ISO 14001 respectively

Water Industry Approved Plumbers Scheme (WIAPS) registered employees

Our teams are also trained in the following areas:

Water hygiene procedures

IOSH (Institute of Occupational Safety and Health) working safely (with IOSH managing safely for supervisors and managers)

Confined space working

Deep excavation and ground support systems

Minimum NVQ Level II in the installation and maintenance of mechanical services

Customer care

Asbestos awareness

The use of abrasive wheels

Correct use and maintenance of appropriate plant and equipment

Contact us to discuss your requirements

Contact us to discuss your requirements

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