TMV Type 2 & 3 Certification – Thermostatic Mixing Valve Testing

Independent, UKAS-accredited testing and certification for thermostatic mixing valves (TMVs) to BS EN 1111, BS EN 1287 and DoH- HTM-04-01 Supplement D 08

Ensure your TMVs are safe, compliant, and ready for market. Kiwa Watertec’s TMV Type 2 and TMV Type 3 certification provides trusted, independent testing and certification - helping you meet the highest standards for performance and safety in homes, hospitals and care settings.

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Thermostatic Mixing Valves (TMVs) are critical for preventing scalding and ensuring safe water temperatures at the point of use. TMV2 and TMV3 certification demonstrates compliance with:

TMV Type 2: BS EN 1111 & BS EN 1287 (domestic and general applications)

TMV Type 3: DoH- HTM-04-01 Supplement D 08 (healthcare, hospitals, care homes)

Kiwa Watertec’s certification process includes rigorous product testing, factory audits, and ongoing surveillance, ensuring your valves meet all regulatory and performance requirements.

Technical Competence

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

Comprehensive Testing

Combined testing options for EN and NHS standards

Flexible Certification

Flexible certification: Level 1+ (annual audits) or Level 3 (5-year retest)

Easy Verification

Listed in the Kiwa TMV Certificate Directory for easy verification

Specialist Expertise

Dedicated technical support and account management

Efficiency Gains

Avoid unnecessary re-testing by combining with other Kiwa certifications

Product Review

Initial Product Review: Technical file assessment and product sampling

Accredited Testing

Laboratory Testing: To BS EN 1111, BS EN 1287, and DoH- HTM-04-01 Supplement D 08

On-site Audits

Factory Audit: Production control audit (Level 1+)

Certification Decision

Certification decision by Kiwa Watertec

Certification Granted

Issuance of TMV certificate and directory listing

Ongoing Assurance

Ongoing Surveillance: Annual audits (Level 1+) or 5-year retest (Level 3)

Compliance:

Meet UK and NHS safety standards

Market Access:

Sell into domestic, commercial and healthcare sectors

Trust:

Certification backed by Kiwa’s global reputation

Efficiency:

Combine with other Kiwa schemes to save time and cost

Recognition:

Achieve a sought-after certification mark and online listing

Risk Reduction:

Demonstrate robust, independent product evaluation

Who We Work With

Supporting the Water Industry

• TMV manufacturers and OEMs

• Plumbing and sanitary product suppliers

• Healthcare and care facility specifiers

• Water suppliers and compliance consultants

• Architects and building services engineers

BS EN 1111 – Thermostatic Mixing Valves for High Pressure

Defines the performance, safety, and durability requirements for thermostatic mixing valves used in high-pressure sanitary tapware systems, ensuring consistent water temperature and protection against scalding.

BS EN 1287 – Thermostatic Mixing Valves for Low Pressure

Specifies the requirements and test methods for thermostatic mixing valves operating in low-pressure water systems, focusing on temperature stability and user safety.

ISO/IEC 17025 – General Requirements for Testing Laboratories

An international standard that specifies the competence and quality management requirements for laboratories performing testing and calibration, ensuring reliable and accurate results.

ISO/IEC 17065 – Requirements for Product Certification Bodies

Defines the criteria for organisations certifying products, processes, or services, ensuring impartiality, consistency, and confidence in certification outcomes.

NHS DoH- HTM-04-01 Supplement D 08 – Health Technical Memorandum: Thermostatic Mixing Valves in Healthcare

The NHS D08 specification sets out stringent performance and safety criteria for TMVs installed in healthcare premises, such as hospitals and care homes, to prevent scalding and ensure patient safety.

Q: Is TMV certification UKAS-accredited?

A: Yes. All testing is conducted in Kiwa Watertec’s ISO/IEC 17025-accredited labs, and the certification scheme is ISO/IEC 17065-accredited.

Q: What’s the difference between TMV2 and TMV3?

A: TMV2 covers domestic/general use (BS EN 1111/1287); TMV3 covers healthcare (NHS D08).

Q: Can I combine TMV certification with other Kiwa approvals?

A: Yes. We offer bundled testing for KUKreg4, BS 6920, and more.

Q: How long does certification take?

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

Q: Where can I verify certified TMVs?

A: Use our TMV Certificate Directory. See Link below.

Simplify product selection and compliance checks with Kiwa’s TMV Certificate Directory. Quickly find certified valves for domestic, commercial, and healthcare use.

Kiwa Watertec’s KUKreg4 scheme offers UKAS-accredited testing and certification for sanitary and plumbing products under Water Regulation 4. Fast, reliable, and recognised across the UK and internationally – helping you get listed, certified, and confidently market-ready.

Uniting specialist expertise in testing, inspection and certification to protect people, assets, and communities

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.

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

Partner with Kiwa Watertec to ensure your thermostatic mixing valves meet the highest standards for safety, compliance, and market access.