The Critical Importance of Water Hygiene Planned Preventative Maintenance (PPM) in Healthcare Settings

In healthcare environments—where vulnerable patients rely on safe, clean surroundings—water hygiene is not just a compliance issue; it’s a critical aspect of patient safety and infection control. Planned Preventative Maintenance (PPM) for water systems is an essential strategy to prevent microbial contamination, protect at-risk individuals, and meet stringent regulatory standards. What is Water Hygiene PPM?… Read more »

Meet the Team: Abi Rogers – From Admin to Engineer

At GMS, we’re proud to celebrate the people who make our work not just productive, but truly enjoyable. Today, we’re shining a spotlight on Abi Rogers, whose journey with us has been nothing short of inspiring. From Admin Desk to Engineering Sites Abi joined GMS in September 2023 on a 12-month contract, originally covering maternity… Read more »

Why Dirty Water Systems May Show No Detectable Legionella: A Closer Look at Bacterial Dynamics and Mutations

In water hygiene management, it’s not uncommon to encounter heavily contaminated water systems that, despite appearing ideal for Legionella pneumophila proliferation, return negative results for Legionella during microbiological analysis. These situations often raise questions about sampling accuracy, environmental suitability, bacterial competition, and the complex behaviour of microbial communities under stress. High TVC, No Legionella: What’s… Read more »

Meet Martin – PPM Engineer

Length of service as of April 2023 – 12 months I have been at GMS for around 12 months now and during that time I have been working as a water hygiene engineer.  My day to day tasks are to carry out the planned preventative maintenance side (PPM) taking water temperatures, servicing expansion vessels ,calorifiers,… Read more »

Rapid Legionella Testing

If you are concerned with the quality of your water and would like rapid peace of mind, GMS have the solution. We can provide rapid legionella tests for you or your own staff to apply yourself, or we can attend site and apply the tests for you. Results can be provided within 25 minutes for… Read more »

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With our extensive experience in Legionella Risk Assessment Services & Water Treatment Services Contact us today to find out how we can help you.

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Thermostatic Mixing Valves (TMVs): Understanding TMV2, TMV3 and Your Legal Responsibilities

Thermostatic Mixing Valves (TMVs) play a critical role in controlling water temperature and reducing the risk of scalding in both domestic and commercial buildings. In higher-risk environments such as healthcare, care homes and education settings, correct valve selection, installation and ongoing maintenance is not just best practice – it is a legal and moral responsibility…. Read more »

How Passing TMVs Drive Legionella and Biofilm Formation

Passing TMVs create the exact conditions Legionella bacteria thrive in. The combined effects include: Once temperature control is lost, biofilm rapidly develops on internal pipe surfaces. Biofilm acts as: As biofilm thickens, it further restricts flow, worsening stagnation and creating a self-reinforcing cycle that accelerates colonisation. In many investigations of persistent Legionella positives, passing TMVs… Read more »

Meet our two Colleagues of the Year!

Winner – North Team: Maddie Smout It is with huge pleasure that we announce Maddie Smout as this year’s Colleague of the Year for the North team, an award that is entirely driven by colleague nominations, making it all the more meaningful. The feedback received about Maddie was overwhelming, consistent, and incredibly heartfelt. Time and… Read more »

Why Hot Water Circulation Failures Remain the Hidden Weakness in Legionella Risk Assessments and Where Remote Monitoring Fits In

Hot water circulation, or more accurately the absence of it, remains one of the most critical areas of focus for any competent Legionella risk assessor. Despite its importance, it continues to be overlooked in the majority of risk assessment documents produced across the industry. Alarmingly, this issue is not confined to inexperienced assessors; it appears… Read more »