How to Fit a TMV2 Mixing Valve (UK)
Install a thermostatic mixing valve to protect vulnerable users. TMV2 vs TMV3 approval, sizing and commissioning.
RelianceHoneywellRadaAltecnic
TMV2 vs TMV3
TMV2 = domestic BS 7942 approval. TMV3 = healthcare NHS D 08 approval. Care homes and hospitals must use TMV3.
Fit
Isolate hot and cold. 15 mm or 22 mm compression. Set outlet temperature: 46 °C basin/bidet, 41 °C bath, 38 °C shower. Commission and record.
Frequently asked questions
- How often should TMVs be serviced?
- Annually — check fail-safe: shut off cold and verify hot flow stops within 5 seconds.
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