BS 8558 was first published in 2011, replacing BS 6700:2006. The 2015 edition (current at the time of this analysis) consolidates guidance on:
Advises on avoiding "dead legs"—lengths of pipe where water might sit still—to minimize the risk of bacterial growth. 2. Installation and Commissioning bs 8558 pdf
The is the British Standard that provides guidance on the design, installation, testing, and maintenance of services supplying water for domestic use within buildings. Accessing the Document BS 8558 was first published in 2011, replacing BS 6700:2006
It incorporates changes to align more closely with revised HSE codes and other documents like PD 855468:2015 (for flushing/disinfection). bs 8558 pdf