What is the British standard for the installation of hot and cold water services inside domestic buildings?

• A. BSEN 806
• B. BSEN 806-2
• C. BS EN 806
• D. BS 8550

Answer: (A)

Inside domestic buildings, hot and cold water services should be installed to BS EN 806. This standard covers the way water systems are designed, installed, tested, and commissioned to keep drinking water safe and ensure a reliable supply. It sets requirements for how piping is run, what materials are suitable for drinking water, and essential practices like preventing contamination, providing backflow protection, and ensuring accessibility for maintenance. The version with a specific part number is a more detailed subset, but for the general inside-building domestic installation, the overarching BS EN 806 standard is the appropriate reference. The other option relates to a different scope or is not the general standard for interior domestic installations.