Cat 5 backflow prevention refers to safeguarding potable water supplies from contamination caused by fluids classified as Category 5 (highly hazardous). Fluid Category 5 is present in almost every water system and it is also the liquid that is likely to cause the most legislative headaches. Fortunately, investing in a water tank that complies with Cat 5 break tank regulations, along with WRAS-approved fixtures for installation, significantly reduces the concerns for installers. Here’s everything you need to know.
What Is Cat 5 Backflow Prevention?
Backflow is a reversal of the normal direction of a liquid, and usually caused by a pressure problem or ruptured vacuum. Backflow is always a nuisance, but if you’re dealing with Category 5 liquids, it is a new level of dangerous. Fluid Category 5 is defined by the Water Management Society as liquids that pose a serious health hazard. The categories include liquids that contain pathogens, are radioactive, or are otherwise toxic.
How Important Is Compliance?
Compliance is a legal requirement. The overarching pieces of legislation are the Water Industry Act 1991, the Water Supply (Water Fittings) Regulations 1999, and the Scottish Water Byelaws. Fluid tanks are covered by various British Standards. One-piece tanks and sectional tanks must ascribe to BS EN 13280:2001. Cat 5 backflow prevention is covered by BS EN 12729:2023. These laws together legalise compulsory notification and approval of all fittings, as well as adherence to backflow prevention requirements. Non-compliance can and does result in fines, criminal charges, and mandatory corrective actions.
What Are WRAS Approved Products?
The Water Regulations Advisory Scheme (WRAS) determines whether a product complies with the Water Supply (Water Fittings) Regulations and Scottish Byelaws. WRAS has three main points of focus in its Cat 5 break tank regulations. The first is water quality and safety, which is ensured with extensive testing. The second is regulatory compliance, effectively assuming accountability on behalf of manufacturers. Finally, WRAS products ensure stakeholder and consumer peace of mind. When dealing with Category 5 Fluids, all three elements are essential.
What Are Appropriate Backflow Prevention Devices?
There are three authorised backflow prevention device classifications. The first is AA. This Cat 5 break tank regulation is an air gap with an unrestricted discharge spill over level. The second is AB. This is an air gap with a weir overflow. Finally – and less commonly – is AD. This is an air gap with an injector. All three have the purpose of creating a physical separation between the water supply and the Fluid Category 5. If there is a gap, there can be no backflow.
Why Is Regular Inspection And Maintenance So Important?
Water and fluids are difficult substances to safely and effectively manage. If there is an opportunity for a leak or a backflow, it is almost a guarantee that your Cat 5 fluid will find it. Factors that can make the problem worse are faulty valves and seals, which can alter the pressure and eliminate the precious air gap. Consequently, most systems have dual safety systems in place, as well as downstream check valves. However, these need to be regularly inspected and maintained to ensure that they are doing their job properly.
What Next?
Don’t take chances with your water system installations—rely on Enduramaxx for WRAS-approved products and expert guidance on Category 5 backflow prevention. Request a quote from our team today!
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