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TMV2 Approval Scheme

Approved Document G - Sanitation, hot water safety and water efficiency (2009 Edition) of the Building Regulations in England and Wales requires that the hot water outlet to a bath should be limited to 48°C. It states that valves conforming to BS EN 1111 or BS EN 1287 are suitable for this purpose. Similar requirements exist in Scotland.

TMV2 approval is targeted at the domestic thermostatic sector and uses BS EN 1111 and BS EN1287 as a basis for the thermostatic valves performance tests.

Download the Easy Guide to TMV2 Approval (pdf)

The BuildCert approval Scheme requires the following as a pre-requisite for approval.

• All manufacturers and factors must have ISO 9001 accreditation or be audited by BuildCert.
• All BuildCert approval holders must become a member of the BuildCert Scheme.
• The Scheme requires 3 test valves be selected from a batch of thirty production valves. If this is undertaken by an independent third party then BuildCert will require confirmation in writing from that third party.
• All valves must have WRAS approval before TMV2 approval can be issued.
• The installation and maintenance documents (I&M) must include information stated by the Scheme.
• Upon gaining approval the valve must meet the schemes audit requirements (performance tested twice within the 5 year approval period).

Applications for approval can be made by the manufacturer (Full Approval) or by a supplier (Factored Approval). In either case an Application From must be submitted, please contact a member of the BuildCert Team if you require any assistance with your application.

Full Approval

The following steps should be completed to gain full TMV2 Approval.

1. Complete and return the form TMV2 to BuildCert along with the installation and maintenance document and the ISO 9001 documentation and scope of accreditation for the manufacturer and the applicant.
2. Arrange the WRAS approval of the valve.
3. BuildCert will inform the applicant in writing of the allocated BuildCert sample number and either request verification of issues or request sample valves for test, an administration invoice will be appended.
4. The applicant will send test sample valves to the test house.
5. The test house will undertake the mechanical testing.
6. The test house will forward the test report and the test sample valve to BuildCert.
7. The test report, sample valve and documentation will be presented to the BuildCert Technical Assessment Panel (TAP) for verification and agreement.
8. An approval letter, Certificate and invoice will be forwarded to the applicant, as appropriate.
9. The valve details will be entered into the approved valve list on the BuildCert website.

Factored Approval (Piggyback)

The following steps should be completed to gain TMV2 Approval for a valve purchased from an approved supplier and rebadged or packaged.

1. Complete and return the form TMV2 to BuildCert along with the installation and maintenance document and the ISO 9001 documentation with scope of accreditation for the manufacturer and the applicant. Also, enclosed should be a completed WRAS F2 application form.
2. BuildCert requires a letter from the original license holder giving consent for the applicant to use the original TMV approval and must state the original BuildCert and WRAS approval numbers. A written statement is required that the existing approved product and the piggyback product are identical in all respects except identification and or handle variants.
3. BuildCert will then inform the applicant in writing of the allocated BuildCert sample number and either request verification of issues or request a sample valve for verification, an admin invoice will be appended.
4. The applicant will send a sample valve to BuildCert.
5. The sample valve and its documentation will then be presented to the BuildCert Technical Assessment Panel (TAP) for verification and agreement.
6. An approval letter and Certificate and invoice will be forwarded to the applicant.
7. The valve details will be entered into the approved valve list on the BuildCert website.

Notes on Quality Requirements

Manufacturers of Thermostatic mixing valves can demonstrate compliance by supplying the Scheme with a copy of a valid ISO 9001 certificate and scope of accreditation or an approved quality system. Where this cannot be supplied a quality audit will be conducted by the scheme to verify compliance with the requirements of the Scheme.

A Primary factor is a company/individual who does not manufacture the valve but distributes a certified valve under his own trade name, the product having only cosmetic changes. An approval for the primary factor is sometimes referred to as a piggyback approval.