TMV Servicing for Cardiff properties
Thermostatic mixing valves protect vulnerable people from scalding, but they also create a section of warm pipework downstream where bacteria can grow. TMVs need regular servicing to make sure they still fail safe, deliver the right temperature and are free from scale and debris.
Water in Cardiff is moderately soft. Softer water means less scale, but debris and corrosion products can still block TMV strainers and check valves, so annual in-service testing remains essential.
Cardiff's purpose-built student housing, city-centre offices and stadium-area hospitality venues all have periods of low use, from university holidays to event-day peaks, which affect how water systems need managing.
What is included
- Mixed water temperature check against set point
- Fail-safe test by isolating the cold supply
- Cleaning and descaling of strainers, filters and check valves
- Recalibration where required
- Asset tagging and digital servicing record
- Replacement of failed valves or cartridges
How often
Manufacturers and HSG274 recommend in-service tests at least annually. Healthcare settings following HTM 04-01 may need a performance check at six to eight weeks after commissioning and then a frequency set by the results.
Legislation in Wales
In Wales, the same health and safety framework applies as in England: the Health and Safety at Work etc. Act 1974, COSHH 2002 and HSE's ACoP L8 and HSG274.
In Cardiff, legionella law is enforced by Cardiff Council's environmental health team for offices, shops, hotels, restaurants and leisure premises, and by HSE for factories, warehouses, hospitals, schools and council-run premises. We cover all CF postcodes in and around Cardiff.
Frequently asked questions
How much does tmv servicing cost in Cardiff?
Prices depend on the size and complexity of the property. A single rented home is a short visit, while a large commercial building may take a day or more. Send us the details and we will give you a fixed price for Cardiff with no hidden extras.
How quickly can you carry out tmv servicing in Cardiff?
Get in touch with your postcode and preferred dates and we will confirm the earliest available appointment in Cardiff.
Is TMV servicing a legal requirement?
There is no law that names TMV servicing, but duty holders must control the risks of scalding and legionella, and HSG274 and manufacturers expect TMVs to be tested and maintained. In healthcare, HTM 04-01 sets the expectation.
What is the difference between TMV2 and TMV3?
TMV2 valves are certified for domestic use. TMV3 valves meet the more demanding NHS specification for healthcare and care settings.