The primary source for the latest version.
For larger systems or those where contamination is suspected, chemical disinfection (usually chlorination) is required. BS 8558 specifies contact times and residual chlorine levels (typically between 0.1 mg/L and 0.3 mg/L free chlorine after completion). 3. Hygiene and Legionella Control
is a critical British Standard that provides complementary guidance to the BS EN 806 series on the design, installation, testing, and maintenance of hot and cold water services for domestic use within buildings. It serves as the primary UK implementation for maintaining safe water hygiene and replaces the older BS 6700 standard, which was withdrawn in 2012. Core Purpose and Scope of BS 8558 bs 8558 pdf
The standard is structured to provide specific "how-to" advice aligned with the parts of BS EN 806:
It incorporates changes to align more closely with revised HSE codes and other documents like PD 855468:2015 (for flushing/disinfection). The primary source for the latest version
Advises on avoiding "dead legs"—lengths of pipe where water might sit still—to minimize the risk of bacterial growth. 2. Installation and Commissioning
For specifying system layouts that prevent stagnation. Core Purpose and Scope of BS 8558 The
Recommends materials like copper (for its antibacterial properties), stainless steel, and approved plastics such as PEX or MDPE.
As a copyrighted British Standard, the official BS 8558:2015 PDF must be purchased through authorized channels: