(titled Guide to the design, installation, testing and maintenance of services supplying water for domestic use within buildings and their curtilages ) serves as the complement to the BS EN 806 series. While BS EN 806 provides the overarching European standards, BS 8558 provides the practical guidance and compliance requirements tailored specifically for the UK water regulations. The standard covers:
The standard provides best practice recommendations for the of hot and cold water services for domestic use within buildings and their surrounding grounds (curtilages). Covering everything from pipe sizing to disinfection and temperature control, BS 8558 provides a clear framework for ensuring water systems are safe, efficient, and hygienic. bs 8558 pdf
The standard is structured to provide specific "how-to" advice aligned with the parts of BS EN 806: (titled Guide to the design, installation, testing and
, is the primary British Standard for domestic water system safety. It provides essential, complementary guidance to the European standard Academia.edu Key Areas Covered System Design & Installation Covering everything from pipe sizing to disinfection and
To ensure longevity and safety, BS 8558 covers the selection of materials for water supply systems. These generally include copper, stainless steel, coated steel, and specific plastics such as PEX and MDPE, provided they meet safety specifications. The standard also provides extensive cross-references to other essential documents, including regulations on corrosion protection (BS 5493), plastic pipework (BS 5955-7), and stainless steel tubes (BS EN 10312).
According to BS 8558:2015, all new water systems—or existing systems undergoing maintenance/modification—must be thoroughly flushed to remove construction debris, organic matter, and excess flux. This is critical to prevent future corrosion and bacterial biofilm development. 3. Maintenance and Water Hygiene
BS 8558 recommends the use of various types of backflow prevention devices, including: