Kiwa Watertec: Trusted Testing & Certification for Sanitary and Plumbing Products
UKAS-accredited services ensuring safety, performance and compliance in water products
Who We Are
Independent Expertise in Water Product Compliance
“We safeguard water quality – guiding product manufacturers through every step of the journey with independent testing, certification and regulatory expertise. By protecting public health and building trust, we help bring high-quality products to market.”
Kiwa Watertec is part of the Kiwa UK Construction & Utilities Cluster, specialising in impartial testing, Inspection and certification for sanitary and plumbing products used in water systems — including taps, valves, water heaters, and fittings. Our UKAS-accredited services help manufacturers, retailers, distributors, specifiers and installers meet legal obligations and ensures compliant products are sold and installed in UK and international markets.
We test to key standards such as Water Regulation 4, TMV Type 2 and Type 3- BS/EN 1111 & BS/EN 12897 and DoH- HTM-04-01 Supplement D 08, BS 6920 and BS/EN 12897, with expert engineers delivering fast, reliable results from accredited laboratories. Our mission is to uphold the highest standards of compliance, safety, performance, and compliance — safeguarding public health and fostering innovation, sustainability, and trust across the water industry.
Why Our Services Matter
Why Certification for Sanitary and Plumbing Products Is Essential
- Demonstrates compliance with UK Water Supply (Water Fittings) and Building Regulations
- Ensures product safety and performance in water systems
- Enables market access and competitive positioning
- Reduces risk of contamination and liability
- Supports traceability and quality assurance
Our Core Services
What We Test & Certify
KUKreg4 – Water Regulation 4 Testing & Certification
Independent testing and certification for products subject to UK Water Regulation 4 requirements.
KUKmat4 – BS 6920 Materials Testing
Assessment of non-metallic materials in contact with drinking water in line with BS 6920.
TMV Certification – Thermostatic Mixing Valves (Type 2 & 3)
Performance and safety testing of Type 2 and Type 3 TMVs to support approval and market access.
KUKG3 – Unvented Water Heater Testing
Evaluation of unvented water heaters to demonstrate compliance with relevant G3 requirements.
Water Products Evaluation
Design review, pre-compliance, and performance testing for new and existing water products.
WRAS Testing Support
Coordination and guidance for testing programmes aligned with WRAS acceptance criteria.
Business Benefits
How Kiwa Watertec Helps You Succeed
Risk Reduction
Ensure safe materials and fittings
Compliance
Meet Water Regulation 4, TMV, BS 6920 Building Regulation G3
Efficiency
Streamline testing and renewals via our platform
Reputation
Display the Kiwa Quality Mark to build trust
Market Access
Certify products for UK and Global water markets
Standards & Regulations We Work To
Standards & Regulations We Work To
Kiwa Watertec’s testing, inspection and certification services are aligned with the most recognised UK and international standards for sanitary and plumbing products. We help manufacturers, specifiers, and installers demonstrate compliance with legal, safety, and performance requirements — supporting market access and public health protection.
We work to the following key standards and frameworks:
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Water Supply (Water Fittings) Regulations 1999
The primary UK regulation governing the design, installation, and use of fittings connected to public water supplies.
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Regulation 4 Certification (KUKreg4)
An ISO 17065 UKAS-accredited scheme that demonstrates compliance with Regulation 4 of the Water Fittings Regulations — a recognised alternative to WRAS approval.
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BS 6920 — Suitability of non-metallic materials for use in contact with drinking water
Ensures materials do not adversely affect water quality, taste, odour, or appearance.
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TMV Type 2 and TMV Type 3 Certification
Certification of thermostatic mixing valves for domestic and healthcare environments.
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TMV Type 2 - BS EN 1111 / BS EN 1287
Standards for thermostatic mixing valves under high and low pressure conditions.
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TMV Type 3 - DoH- HTM-04-01 Supplement D 08
Healthcare guidance requirements for TMV Type 3 applications under DoH- HTM-04-01 Supplement D 08.
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EU Drinking Water Directive (DWD)
We support manufacturers aiming to meet the requirements of the DWD for placing products on the EU market.
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Fit4DW Initiative
Fit4DW is a database created between Kiwa, DVGW and figawa to store certified information of materials and components, which can be used to support certification processes for agents, consultants, manufacturers and retailers, with the aim to speed up the certification process.
Why Choose Us?
Why Partner with Us
Our combination of technical expertise, regulatory insight, and customer-first service makes us the ideal choice for sanitary and plumbing product compliance.
Clear, timely advice from experienced engineers
Testing undertaken in ISO 17025 accredited laboratories
Fast-track options and pre-compliance support
Cost-effective bundled services
Trusted by leading manufacturers and specifiers
Certification processes are under ISO 17065 (where applicable)
Who We Work With
Supporting the Water Supply Chain
- Product Manufacturers
- Plumbing & Sanitaryware Brands
- Specifiers & Architects
- Retailers & Distributors
- Regulatory Bodies & Water Authorities
- Education boards
Case Study
Proven Impact
Achieving the Kiwa UK Regulation 4 certification has significantly boosted our product credibility. Our customers trust the quality and compliance of our products more than ever.
— Lochinvar UK
How We Work With You
The 4 Step Certification Process
Choose your testing, inspection or certification requirement and submit an application.
Undergo initial assessment and audits
Receive certification and access to our platform
Maintain compliance through ongoing inspections and renewals
Frequently Asked Questions
What are Attestation Levels 3 and 1+?
Attestation levels refer to the level of oversight required for demonstrating product conformity under UK and EU regulations.
Level 3 involves type testing by a third party such as Kiwa Watetec and our UKAS-accredited laboritories. There are no annual audits, so full re tests are required after 5 years.
Level 1+ is more rigorous and includes initial type testing, continuous surveillance and audits of factory production control by a notified or approved body.
Unlike many of our competitors, Kiwa Watertec can support both levels depending on the product and regulatory requirements.
What should I do if a specifier isn’t aware that KUKreg4 is a legitimate alternative to WRAS?
You can confidently inform them that KUKreg4 is a UKAS-accredited certification scheme that demonstrates compliance with Reg 4 of the Water Supply (Water Fittings) Regulations 1999. It is recognised by water companies and regulators as a valid route to demonstrate compliance. We’re happy to provide supporting documentation or speak directly with specifiers to clarify.
What is Water Regulation 4?
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.
Do you offer support during the certification process?
Absolutely. Our team guides you step-by-step and provides ongoing support.
What Is Third-Party Certification?
Third-party certification means an independent body (like Watertec) verifies that specific requirements have been met. This impartial assurance is valued by clients, regulators, and insurers.
What Is Accreditation and Why Does It Matter?
Accreditation is formal recognition that a certification body is competent to carry out assessments. Watertec is accredited by UKAS, which ensures our certification practices meet national and international standards.
How Can I Find Certified Products?
Use our live search directory to find certified installers and products, along with all relevant details. [View Directories] https://www.kiwa.com/gb/en-gb/about-kiwa/certificate-checker
Certify with Confidence
Partner with Kiwa Watertec to ensure your sanitary and plumbing products meet the highest standards for safety, compliance, and performance.