TMV SERVICING & LEGIONELLA RISK ASSESSMENT

AAC Gas provides professional TMV servicing, Legionella risk assessments, and remedial repairs across the North West, supporting businesses that must maintain safe water systems and meet strict health and safety regulations.We work with care homes, healthcare facilities, schools, commercial buildings, and industrial sites, ensuring hot and cold water systems are safe, compliant, and operating correctly.With over 20 years of experience in commercial and industrial environments, we deliver fully compliant inspections, clear reporting, and practical solutions.

WHAT IS TMV SERVICING & WHY IS IT IMPORTANT?
Thermostatic Mixing Valves (TMVs) are critical safety devices that control water temperature and prevent scalding, particularly in high-risk environments.Regular servicing is essential to:

  • Ensure safe outlet temperatures
  • Prevent scalding risks to vulnerable users
  • Maintain compliance with healthcare and HSE guidance
  • Ensure valves operate correctly and reliably
  • Prevent failure due to scale, debris, or wear

Failure to maintain TMVs can lead to serious safety risks and non-compliance.
TMV SERVICING & MAINTENANCE
AAC Gas provides full TMV inspection, servicing, and maintenance programmes tailored to your building and usage.

Our TMV services include:

  • Temperature testing and calibration
  • Fail-safe operation checks
  • Strip-down, cleaning, and descaling
  • Internal component inspection
  • Replacement of seals and cartridges
  • Recommissioning to correct set temperatures
  • Identification of failed or non-compliant valves
We provide detailed records and reports for compliance and auditing purposes.
LEGIONELLA RISK ASSESSMENTS
Legionella bacteria can develop in poorly maintained water systems and pose a serious health risk, particularly in large or complex buildings.AAC Gas carries out Legionella risk assessments in line with HSE guidance, identifying potential risks and ensuring you meet your legal responsibilities.Our assessments include:

  • Full inspection of hot and cold water systems
  • Identification of dead legs and stagnation points
  • Review of system temperatures and storage
  • Inspection of tanks, calorifiers, and distribution systems
  • Risk grading and compliance evaluation
  • Written report with recommendations

We provide clear, actionable guidance to help you maintain a safe and compliant water system.
LEGIONELLA REMEDIAL WORKS & REPAIRS
If risks or failures are identified, AAC Gas can carry out all necessary remedial works to bring your system back into compliance.

Typical remedial works include:

  • Removal of dead legs and redundant pipework
  • TMV replacement and upgrades
  • Pipework modifications and improvements
  • Tank cleaning, insulation, and upgrades
  • Temperature control adjustments
  • System flushing and disinfection support
  • Installation of monitoring points and controls

We don’t just identify problems — we provide practical solutions and complete repairs.

TMV & Legionella Compliance for High-Risk Environments

We regularly support environments where water safety is critical:

1

Care Homes & Healthcare Facilities

We ensure TMVs and water systems are safe for vulnerable residents, meeting CQC and HSE requirements.

2

Schools & Educational Buildings

We help maintain safe water temperatures and reduce Legionella risks across busy facilities.

3

Commercial & Industrial Sites

We support offices, factories, and large buildings with complex water systems requiring structured compliance.

PLANNED MAINTENANCE & COMPLIANCE SUPPORT
AAC Gas offers ongoing support to ensure your systems remain compliant year-round:

  • Scheduled TMV servicing programmes
  • Routine temperature monitoring
  • Annual Legionella risk assessments
  • Compliance logbooks and reporting
  • Pre-audit inspections
  • Ongoing maintenance and repairs

We help you stay compliant with:

  • Health & Safety at Work Act
  • HSE Approved Code of Practice (ACoP L8)
  • HSG274 Guidance
WHAT OUR SERVICE COVERS
Our combined TMV and Legionella services provide full system coverage, including:

  • Thermostatic Mixing Valves (TMVs)
  • Hot and cold water distribution systems
  • Calorifiers and hot water storage
  • Cold water storage tanks
  • Pipework and outlets
  • Temperature control systems

All work is carried out with a focus on safety, compliance, and long-term reliability.
WHY CHOOSE AAC GAS?
  • Over 20 years’ experience in commercial systems
  • Specialists in care homes and high-risk environments
  • Full TMV servicing, Legionella risk assessments & repairs
  • Clear compliance reporting and documentation
  • Fast response across the North West
  • Planned maintenance and ongoing support availableWe provide practical, compliant solutions — not just reports.