SUPERMARKET REFIGERATION Hidden risks W


alk into any supermarket, and you’ll see hundreds of refrigerated display cabinets, cold rooms, and food preparation areas


operating continuously to keep food safe, preserve product quality, and maintain regulatory compliance. Compressors, evaporators, electronic controls and energy effi ciency rightly receive signifi cant attention, yet one of the most fundamental elements of every refrigeration system is still too often overlooked – the condensate drainage system. When a condensate drain becomes restricted or blocked, the eff ects can escalate surprisingly quickly. Water leaks onto shop fl oors, creating slip hazards for customers and staff . Standing water damages fl ooring, fi xtures and equipment, unpleasant odours develop, microbial growth increases and emergency engineer call-outs become inevitable. What begins as a relatively minor


drainage issue can quickly become an expensive operational problem. Despite these risks, condensate drainage is still frequently treated as an afterthought rather than as a critical part of preventative maintenance.


Over years of working alongside


refrigeration contractors, facilities management companies, and some of the UK’s largest supermarket operators, I have seen countless drainage failures. What stands out is that very few occur without warning. In almost every case, the problem has been developing quietly over weeks or months before fi nally becoming visible. That gradual deterioration is exactly why preventative maintenance is so important.


The hidden build-up Condensate drainage systems operate continuously in damp, nutrient-rich environments. Dust, grease,


18 October 2026 • www.acr-news.com beneath the surface


Condensate drains are a small component with an outsized impact, yet they remain one of the least prioritised areas of system upkeep. Nicola Cove, Managing Director at GelClear, explains why neglected drain maintenance continues to cause avoidable failures, hygiene issues and rising operational costs.


airborne contaminants and food particles naturally collect within the pipework, where they combine with moisture to form biofi lm. Over time, this progressively restricts water fl ow until drains back up into cabinet bases, condensate pumps or evaporator trays.


Unlike many refrigeration faults, drainage


problems are rarely obvious during their early stages. A compressor failure or electronic fault usually generates an alarm. A blocked condensate drain does not. Instead, the restriction develops slowly until the system can no longer cope with the volume of condensate being produced. By the time water appears on the fl oor, the underlying problem has often existed for many months.


The cost of poor condensate drainage extends far beyond simply clearing a blockage. Emergency call-outs interrupt planned maintenance schedules, engineers spend valuable time resolving avoidable faults, and retailers experience disruption to


trading. Water damage can aff ect fl ooring, cabinetry and surrounding


fi xtures, whilst persistent moisture creates unnecessary hygiene concerns. In busy retail environments, even relatively small water leaks can require immediate attention because customer safety is paramount. A blocked condensate drain can therefore become not only a maintenance issue but also an operational and reputational one. Many of these costs are entirely avoidable.


Good installation matters Maintenance can only ever be as eff ective as the original installation. Even a perfectly clean drainage system will struggle if pipework has insuffi cient fall,


unsupported horizontal runs, unnecessary bends or kinked fl exible hose. Poorly positioned condensate pumps can create similar problems, particularly where access for future servicing has not been considered. Designing drainage systems with maintenance in mind pays dividends throughout the life of the installation. Engineers should be able to inspect pipework easily, access condensate pumps without dismantling surrounding equipment and verify that drainage remains unrestricted. Small improvements during installation frequently


prevent years of recurring maintenance issues. An eff ective preventative maintenance programme should extend well beyond checking whether condensate is fl owing.


Routine maintenance should include inspecting


drain outlets, cleaning evaporator drip trays, confi rming that pipework maintains adequate fall, checking that supports remain secure, inspecting condensate pumps, cleaning evaporator coils where appropriate, and treating drainage systems with suitable preventative products. Discharge pipework should also be checked to ensure it remains unrestricted throughout its entire length. None of these tasks is particularly time-consuming


on its own. However, when carried out consistently, they signifi cantly reduce the likelihood of costly emergency failures. Perhaps more importantly,


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