This guide explains the principles and technology used in hot and cold water services, also known as domestic water services, in all types of buildings. It also includes sections on drainage and installation and commissioning. For more information about water in heating and cooling systems, please see The Illustrated Guide to Mechanical Building Services. Ready access to a supply of clean water is essential for our daily activities. Building users have a right to expect that tap water is safe to drink. There are significant health and safety issues that need to be considered when designing, installing and maintaining hot and cold water services in buildings. For construction clients, this guide provides a simple insight into the main system options discussed during the briefing process. Consequently, it can help clients communicate better with the design team and help them raise relevant technical questions. For construction professionals, the guide provides a quick reference to hot and cold water services systems. BSRIA has published several companion guides: Illustrated Guide to Mechanical Building Services - covering heating, ventilation, air conditioning and controls Illustrated Guide to Electrical Building Services - covering power distribution, on-site generation, lighting and fire-alarms Illustrated Guide to Renewable Technologies - covering photovoltaics, heat pumps and biomass boilers BSRIA's Set of 6 Illustrated Guides provides great value and contains Illustrated Guide to Hot and Cold Water Services, the campanion guides listed above plus illustrated guides to ventilation and mechanical cooling. Available in hard copy and PDF version and only GBP170/ GBP85 to BSRIA members.