Services
Thermostatic Mixing Valve (TMV) Services
Thermostatic Mixing Valves (TMVs) play a vital role in controlling water temperature at the point of use, especially in environments where user safety is critical—such as hospitals, care homes, schools, and other commercial or public buildings. At TMV Servicing, we provide specialist TMV servicing, maintenance, and testing across the UK to ensure your systems remain safe, compliant, and fully operational.
TMV Servicing
TMV servicing is the backbone of any water safety strategy involving thermostatic mixing valves. Over time, TMVs can suffer from wear, scale build-up, debris accumulation, or component failure, which can result in temperature fluctuations or complete valve failure. These issues not only compromise user safety but also put you at risk of non-compliance with HTM 04-01 and other industry regulations.
Our TMV servicing includes a thorough inspection of each valve, disassembly and cleaning of internal parts, replacement of worn components, and performance testing to ensure safe temperature regulation. We service all major TMV brands and models, and our engineers carry a full range of spares for quick repairs on-site.
A properly serviced TMV ensures that hot water is blended accurately with cold water to deliver a consistent outlet temperature. This protects vulnerable users from the risk of scalding while also preventing water from becoming too cool, which can encourage the growth of Legionella bacteria.
Whether your site has just a few valves or hundreds spread across multiple buildings, we offer flexible service plans to fit your schedule and requirements. All our work is logged and documented in compliance with your regulatory obligations, including detailed records for audit purposes.
TMV Maintenance
Routine TMV maintenance is essential for long-term performance and water safety. While servicing addresses more in-depth valve issues, regular maintenance ensures your system stays in good working order between major service intervals. Without ongoing maintenance, valves can deteriorate over time, resulting in poor temperature control, slow response times, or system failures that put users at risk.
Our TMV maintenance packages are designed to suit a wide range of commercial and public sector environments. Maintenance tasks typically include checking for leaks, inspecting strainers and filters, flushing valves to remove scale or debris, and lubricating moving parts where required. We also monitor each valve’s response time to temperature changes, which can indicate early signs of failure or blockage.
We recommend planned maintenance visits at least annually, but in high-risk environments—such as hospitals, care homes, or facilities with immunocompromised individuals—more frequent maintenance may be necessary to maintain compliance with HTM and HSE guidance.
Our engineers are trained to spot early warning signs of valve deterioration, helping you take preventive action before more serious issues occur. This proactive approach not only improves safety but also helps extend the lifespan of your TMVs, reducing long-term costs and avoiding unexpected downtime.
TMV Testing
Accurate TMV testing is a legal and safety requirement in many sectors, particularly where temperature-controlled outlets are used by vulnerable individuals. HTM 04-01, for example, stipulates regular testing of thermostatic mixing valves to confirm that they are operating within safe parameters.
Our TMV testing services involve using calibrated equipment to measure the outlet temperature of each valve and confirm that it is delivering water within the safe temperature range (typically around 41°C for washbasins in healthcare settings). If a valve is found to be under- or over-performing, we take immediate action to adjust, repair, or replace it.
We also test for temperature stability, ensuring the valve reacts quickly and correctly to changes in water pressure or temperature. A slow or inconsistent response can indicate scale build-up, a damaged thermostat, or internal wear—all of which can pose serious safety risks if left unaddressed.
In addition to outlet temperature testing, we carry out fail-safe testing to check how each valve behaves in the event of a hot or cold water supply failure. A properly functioning TMV should shut off or drastically reduce flow in such cases, protecting the user from sudden scalding or cold shocks.
All results are recorded and provided in a detailed testing report, which forms part of your water safety log. These records can be crucial in the event of inspections or compliance audits.
Why Choose TMV Servicing?
- Specialist Knowledge: We work exclusively with TMVs, so you benefit from expert knowledge and targeted solutions.
- Compliance-Focused: All our work aligns with relevant legislation and guidelines, including HTM 04-01, HSE L8, and COSHH.
- Nationwide Coverage: We serve businesses, healthcare providers, and institutions across the UK.
- Flexible Scheduling: Our service and maintenance plans can be tailored to minimise disruption to your operations.
- Emergency Support: If you experience valve failure or urgent issues, our responsive team is on hand to provide rapid assistance.
- Comprehensive Reporting: We supply full service records, testing reports, and certification to keep your documentation in order.
Who We Work With
We regularly provide TMV servicing, maintenance, and testing for:
- NHS Trusts and private healthcare providers
- Care homes and assisted living facilities
- Schools, colleges, and universities
- Hotels, leisure centres, and hospitality venues
- Commercial buildings and offices
- Housing associations and property managers
Whether you’re responsible for a single building or an estate of multiple sites, our experienced team can manage your TMVs with minimal hassle and maximum professionalism.
