Mr. Graeme Bunt1, Mr. Richard Ford1
1Gentec Australia Pty Ltd, Mascot/Sydney, Australia
Biography:
Graeme Bunt is the Brand Ambassador for GENTEC and former General Manager – Sales with 39 years of experience in sales, including 13 years leading GENTEC’s sales team. He specialises in infection prevention solutions and advancing healthcare plumbing technologies across Australia.
Abstract:
Issue
A major metropolitan health service in Victoria identified persistent issues with biofilm formation in basin wastes, raising concerns about infection risks at handwashing stations. Visual biofilm presence highlighted the need for an infrastructure-led response to reduce potential risks for microbial contamination.
What Was Done
We collaborated with facility stakeholders to implement a series of practical interventions. All polyvinyl chloride (PVC) bottle traps were replaced with stainless steel basin wastes to enhance durability and reduce microbial retention. Grate Seal® one-way valves were installed at each basin to eliminate airflow from contaminated plumbing and minimise aerosolization of biofilm and bacteria risks. All tapware was fitted with laminar flow outlets to reduce aerosol generation. In addition, existing sensor taps were reprogrammed to activate scheduled hygiene flushing, minimise the risk of Legionella and ensure regular rinsing of stagnant water lines.
Results
The combined measures improved the water hygiene infrastructure. A notable reduction in visible contamination was reported and overall maintenance issues related to the basin waste. Infection control personnel expressed increased confidence in the safety of the hand hygiene zones.
Conclusions
A coordinated approach to plumbing upgrades can significantly reduce infection risks associated with biofilm and stagnant water. Incorporating one-way valves, improved drainage, and hygiene flushing offers a practical, scalable model for other healthcare facilities.
Lessons Learnt
Targeted design interventions—addressing risk associated with centred waste basins versus offset waste basins, drainage, and flushing protocols—play a critical role in supporting infection prevention and maintaining water hygiene in clinical settings.