Rethinking Water Regulation 4 Certification: Faster Routes to Market for Manufacturers
Introduction
For manufacturers of plumbing and sanitary products, demonstrating compliance with Water Regulation 4 is essential to accessing the UK market. However, long-standing assumptions about how compliance must be achieved are now being challenged. A clearer understanding of certification pathways can help reduce delays, control costs, and support faster product launches - without compromising safety or regulatory assurance.
Why Water Regulation 4 still matters
Since its introduction, Regulation 4 of the Water Supply (Water Fittings) Regulations has set the benchmark for products connected to the UK public mains water supply. Its purpose is consistent and critical: to protect water quality, safeguard public health, and ensure plumbing systems operate reliably without risk
Compliance is not tied to any single organisation. Regulation 4 itself is the legal requirement, forming the basis for trust across the entire value chain - from manufacturers and specifiers through to installers, building owners and end users.
Moving beyond the WRAS-only mindset
For many years, the industry has relied heavily on WRAS approval as a route to demonstrate compliance with Water Regulation 4. While widely recognised, WRAS is not the regulator, and approval through a single scheme is not a legal requirement.
This distinction is important. The perception that there is only one accepted pathway has led to inefficiencies - particularly where specification practices and procurement expectations default to a single route.
As demand has increased, this reliance has also contributed to capacity constraints. Manufacturers can experience delays of weeks or months, even when their products meet all necessary standards.
How alternative certification approaches work
A growing number of independent certification bodies now provide compliant routes aligned to Water Regulation 4. These approaches are designed to maintain rigour while improving speed and efficiency.
Kiwa Watertec’s KUKreg4 certification scheme is one example, combining testing, inspection and certification within a single, integrated process.
A simplified certification journey
While exact processes vary depending on the product and scope, a typical approach may include:
Initial product review against applicable standards
Testing to relevant requirements (e.g. material safety and performance)
Assessment of manufacturing processes
Certification decision based on compliance evidence
Ongoing surveillance or periodic reassessment (depending on certification route)
Integration with relevant European standards where applicable
Continued monitoring to support consistency over time
This integrated model can reduce duplication and streamline decision-making, supporting faster progression from testing to certification.
Understanding KUKreg4 certification levels
KUKreg4 certification offers two distinct approaches, allowing manufacturers to select a route that aligns with their product requirements and internal processes.
- KUKreg4 Level 3 follows a more traditional certification model that the UK industry Is familiar with. This includes Initial full product testing and certification, with full re-testing required after 5 years. Under this route there is no annual surveillance.
- KUKreg4 Level 1+ is based on an initial manufacturing facility audit, product testing and annual manufacturer inspections. This approach is a way of continuous certification within a more robust process.
Why Level 1+ matters
For manufacturers, the Level 1+ model offers a number of important advantages:
Consistency of production:
Reduced need for full re-testing:
Continuous improvement:
Greater efficiency over time:
For the wider water industry, this approach contributes to maintaining confidence that products entering the market continue to meet the requirements of Water Regulation 4, supporting the protection of water quality and public health.
What this means for manufacturers
For UK and international manufacturers, a broader view of certification routes offers several practical advantages:
Reduced time to market:
Improved cost efficiency:
Greater flexibility:
International alignment:
These benefits support not only operational efficiency but also competitiveness in a regulated and time-sensitive market.
Supporting compliance without compromise
Importantly, alternative certification routes do not lower standards. They are designed to deliver the same level of assurance required under Water Regulation 4 - protecting water quality and public health while enabling innovation and product development.
For the industry, this represents an opportunity to shift away from legacy assumptions and towards a more flexible, outcomes-based approach. Certification should be judged on its rigour, efficiency and ability to support progress - not just familiarity.
Conclusion and next steps
As expectations evolve, manufacturers can benefit from reviewing how they approach Water Regulation 4 compliance. By considering a wider range of certification pathways, it is possible to maintain high standards while improving speed, efficiency and market access.
To learn more about certification options and how Kiwa Watertec supports manufacturers, visit the link below.
Frequently asked questions
Q: What is Water Regulation 4?
A: Water Regulation 4 is part of the Water Supply (Water Fittings) Regulations 1999, which governs the design, installation, and use of fittings that carry or receive water from the public supply. Regulation 4 requires that all fittings and materials used must not cause waste, misuse, undue consumption, or contamination of the water supply. Certification schemes like KUKreg4 help manufacturers demonstrate compliance with this regulation.
Q: What is KUKreg4 certification?
A: KUKreg4 is a certification scheme from Kiwa that combines testing, inspection and certification to demonstrate compliance with Water Regulation 4.
Q: Does alternative certification compromise standards?
A: No. Certification routes must still meet the requirements of Water Regulation 4, ensuring safety, quality and performance.
Q: Can I combine KUKreg4 with other Kiwa certifications?
A: Yes. We offer bundled testing for EN standards and other Kiwa schemes to save time and cost.
Q: Is KUKreg4 recognised internationally?
A: Yes. It is accepted in countries and regions across the world that adopt UK water regulation compliance.
Q: What types of products can be certified?
A: Tapware, valves, pipes, fittings, appliances, catering equipment, and more.