KUKreg4 Water Regulation 4 Testing, Inspection & Certification with Kiwa Watertec

Independent, UKAS-accredited testing, Inspection and certification for sanitary and plumbing products under the Water Supply (Water Fittings) Regulations 1999..

Accelerate your market access with KUKreg4 - A ISO 17025 and ISO 17065 UKAS-accredited route to Water Regulation 4 compliance. Gianing KUKreg4 certification of your plumbing products demonstrates your products meets the legal requirements of Water Regulation 4, differentiates you from non-compliant competitors and shows you meet safety, quality and performance standards.

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KUKreg4 is Kiwa Watertec’s dedicated product approval scheme for demonstrating compliance with the Water Supply (Water Fittings) Regulations 1999. It applies to a wide range of sanitary and plumbing products intended for installation in UK water systems.

KUKreg4 is Kiwa Watertec’s dedicated product certification for demonstrating compliance with the Water Supply (Water Fittings) Regulations 1999-Water Regulation 4. It applies to any sanitary and plumbing products intended for installation in UK water systems.

We offer two levels of conformity:

Level 3 – Product testing and certification.

We provide intial testing and full re-test after 5 year, with no annual audits

Level +1 – Product testing, certification, and annual surveillance

Initial testing, Initial manufacturing site factory audit (where applicable), Annual audits

Kiwa Resources

Explore Our KUKreg4 Brochure

Get a detailed overview of Kiwa Watertec’s KUKreg4 certification service. How we help manufacturers meet UK water regulations, streamline compliance, and ensure product safety and performance.

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Technical Competence

UKAS-accredited ISO/IEC 17025 testing and ISO/IEC 17065 certification

Comprehensive Testing

Combined testing options with EN standards (e.g. EN1111, EN817)

Ongoing Assessment

Annual surveillance without 5-year retest (Level +1)

Easy Verification

Listed in the KUKreg4 Approved Products Directory

Worldwide Acceptance

Recognised by WSD Hong Kong for General Acceptance

Product Review

Initial product review and technical file assessment

Accredited Testing

Laboratory testing (where applicable)

Certification decision

Certification decision by Kiwa Watertec’s certification department

Certification Granted

Issuance of KUKreg4 certificate and directory listing

Ongoing Assurance

Optional annual surveillance for Level +1 certification

Guaranteed Compliance:

Meet UK Water Regulation 4 requirements and stay compliant with annual audits.

Faster Market Access:

Accelerate your entry into UK and international markets with streamlined testing and certification

Cost Savings:

Reduce overall costs by combining KUKreg4 with EN standard testing and other Kiwa certifications.

Global Trust:

Backed by Kiwa’s worldwide reputation and independent, rigorous evaluation.

Stand Out:

Differentiate your products with third-party certification that signals quality and reliability.

Maximum Visibility:

Gain a sought-after certification mark and feature in the KUKreg4 database used by water suppliers, architects, and specifiers.

Comprehensive Solution:

Access a complete testing and certification package for international product safety.

Smooth Process:

Enjoy a hassle-free certification journey with all decisions made within Kiwa.

Annual Surveillance (Level +1):

Maintain certification without a 5-year retest—ideal for large product ranges and combined factory inspections.

Who We Work With

Supporting the Plumbing and Sanitary Industry

• Plumbing product manufacturers

• Plumbing system component suppliers

• Distributors and importers of water fittings

• Specifiers and compliance consultants

• International manufacturers entering the UK market

• Education sector

• Industry technical bodies

• Industry associations

Water Supply (Water Fittings) Regulations 1999

The legal framework governing the design, installation, and maintenance of water fittings in England and Wales to prevent waste, misuse, and contamination of drinking water.

Water Supply (Water Fittings) (Scotland) Byelaws 2014

Scottish regulations that mirror the principles of the 1999 Regulations, ensuring water fittings are suitable and do not compromise water quality or safety.

Water Supply (Water Fittings) Regulations (Northern Ireland) 2009

Northern Ireland’s version of the Water Fittings Regulations, designed to protect public water supplies through appropriate product standards and installation practices.

BS 6920 — Suitability of non-metallic materials for contact with drinking water

Specifies methods for testing the effect of non-metallic materials on water quality, including taste, odour, appearance, and growth of aquatic microorganisms.

BS/EN Standards

Many various standards that have been deemed appropriate e.g. EN 1111, EN 817, EN 200, EN 248. These standards define performance, safety, and durability requirements for sanitary fittings used in domestic and commercial water systems.

"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

Q: Is KUKreg4 certification UKAS-accredited, and where is the testing carried out?

A: Yes. All testing is conducted and controlled within Kiwa Watertec’s laboratories, which are ISO/IEC 17025 accredited by UKAS, RVA, and Accredia. The KUKreg4 certification scheme itself is ISO/IEC 17065 accredited, ensuring full compliance with international standards for both testing and certification.

Q: What types of products can be certified?

A: Tapware, valves, pipes, fittings, appliances, catering equipment, and more.

Q: Is KUKreg4 recognised internationally?

A: Yes. It is accepted in countries and regions across the world that adopt UK water regulation compliance.

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: How quickly can I get certified?

A: Our streamlined process enables fast turnaround, with direct access to our in-house testing and certification team.

Ensure water safety and regulatory compliance with ease. Kiwa’s KUKreg4 Directory helps you verify certified products for domestic, commercial, and public sector installations.

Get fast, accredited BS 6920 testing and certification for non-metallic materials in contact with drinking water. Recognised for UK and international regulatory compliance.

Accelerate product development with expert design evaluation and pre-compliance testing for sanitary and plumbing products. Trusted by manufacturers, engineers, and suppliers to meet UK and European water standards.

KUKreg4 has now been officially recognised by WSD

KUKreg4 has now been officially recognised by WSD (Water Supplies Department) Hong Kong for use in General Acceptance (GA) system, a huge milestone for the scheme representing a tremendous amount of work.

The Water Supplies Department (WSD)
The Government of the Hong Kong Special Administration Region

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