Multi-part Document
BS EN 12056 - Gravity drainage systems inside buildings

This is a multi-part document divided into the following parts:

• Part 1 Gravity drainage systems inside buildings. General and performance requirements
• Part 2 Gravity drainage systems inside buildings. Sanitary pipework, layout and calculation
• Part 3 Gravity drainage systems inside buildings. Roof drainage, layout and calculation
• Part 4 Gravity drainage systems inside buildings. Wastewater lifting plants. Layout and calculation
• Part 5 Gravity drainage systems inside buildings. Installation and testing, instructions for operation, maintenance and use