Specifically regarding hot water ("hot"), the standard focuses on preventing bacterial growth and ensuring efficient delivery:
It details procedures for pressure testing, flushing, and disinfection to ensure systems are robust and clean before they are put into service. Key Hot Water Standards
The project began with a comprehensive assessment of Greenhaven's current infrastructure. Engineers and environmental scientists worked together to design a system that not only met the current needs but was also scalable for future growth. They opted for thermoplastics pipes and fittings that were not only compliant with BS 8558 Part 1 but also made from recycled materials, reducing the carbon footprint of the project. bs 8558 pdf hot
Formerly the all-in-one standard for water supply design.
: The circulating distribution pipework must ensure that the water temperature return loop does not drop below 50°C (or 55°C in high-risk healthcare facilities). They opted for thermoplastics pipes and fittings that
Hot water systems (showers, taps, storage vessels) are high-risk areas for bacterial growth, specifically Legionella bacteria, which thrive between 20°C and 45°C. is crucial because it helps minimize these risks through proper design and maintenance. 1. Design and Installation
The BS 8558 standard is crucial for ensuring the safe distribution of hot water in domestic settings. Thermostatic mixing valves play a vital role in preventing scalding and ensuring a safe temperature for users. The standard helps to: Hot water systems (showers, taps, storage vessels) are
Sizing pipework, material selection, and choosing appropriate storage solutions.
This standard is especially important because it bridges a historical gap in UK water regulations. It replaces the now-withdrawn BS 6700:2006+A1:2009, adapting its best practices to align with the European BS EN 806 framework. BS 8558 also provides UK-specific guidance on aspects that the European standards may not cover in detail, such as sampling and monitoring protocols, and advice on underground pipework within a building's curtilage.
: Hot water should be stored at at least 60°C to kill Legionella bacteria.