Specifies requirements for both hot and cold water supplies with a maximum hot water temperature of 80 degrees Celsius allowing an excursion to 95 degrees Celsius using metallic and non-metallic flexible tubes with end connection assemblies for above-ground application only. Nominal sizes to range from DN 2 to DN 50 (inclusive) with a continuous working pressure not exceeding 1.4 MPa and where the normal working temperature does not exceed 95 degrees Celsius. Flexible tubes for cold water applications, capable of withstanding temperatures up to 60 degrees Celsius, are included. The construction of flexible tubes is not included.