Health & Safety Executive (HSE) guidance (often called ACoP L8) references BS 8558 for technical water system design. The standard details:
As of late 2025, BSI is reviewing BS 8558 for potential alignment with the new Building Safety Act and the shift towards digital water management (smart meters, IoT flow sensors). Expect a revision or amendment by 2026/2027 regarding:
If you buy a BS 8558 PDF today, most publishers offer a "standing order" scheme where you automatically receive a free updated PDF if the standard is revised within 12 months. bs 8558 pdf
BS 8558:2015 (sometimes searched as BS 8558:2011 or BS 8558:2017, though 2015 is the current confirmed version) is the British Standard titled: "Guide to the design, installation, testing and maintenance of services supplying water for domestic use within buildings and their curtilages – Complementary guidance to BS EN 806."
In simpler terms, BS 8558 bridges the gap between European standards (BS EN 806) and UK water regulations (The Water Supply (Water Fittings) Regulations 1999). It provides practical, UK-specific guidance that superseded the old BS 6700. Health & Safety Executive (HSE) guidance (often called
If you want, I can:
One of the most critical sections of the standard deals with backflow prevention. BS 8558 provides guidance on fluid categories and the specific types of backflow prevention devices required for different applications (e.g., dental chairs, industrial equipment, and garden taps) to prevent contaminated water from siphoning back into the public supply. If you buy a BS 8558 PDF today,
BS 8558 mandates:
The British Standards Institution (BSI) sells direct. You can purchase a secure PDF with digital watermarking. As of 2025, the standalone cost is approximately £280–£350 (VAT may apply). Once bought, you can download it immediately and access updates if you purchase a "BSI Standards Online" subscription.