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It specifically covers "above ground" drainage, focusing on the pipework from the sanitary appliance (like a sink or toilet) to the point where it connects to the external sewer system. Core Performance Requirements

A quick typo is common with document IDs. The actual standard is very likely . This document is widely recognized and cited, and it's most likely what you're trying to find. bs en 120561 pdf free download top

The BS EN 12056 is a crucial European standard that provides the rules and guidelines for designing, installing, and testing gravity drainage systems inside buildings. Think of it as the comprehensive playbook for making sure wastewater from sinks, toilets, and rainwater from roofs flows away from a building safely, efficiently, and without causing problems like foul smells, blockages, or flooding. It specifically covers "above ground" drainage, focusing on