TS EN 12056-1

TS EN 12056-1 is the core standard addressing the general and performance requirements for gravity-based waste water drainage systems inside buildings. It provides a common technical framework for drainage arrangements used in dwellings, commercial premises, institutional buildings and industrial buildings, focusing on how such systems are understood, classified and expected to perform within the building.

What gravity drainage means in building services

In general technical terms, gravity drainage relies on slope and gravitational flow rather than pumping to convey waste water. System performance is shaped by concepts such as pipe layout, continuity of fall, air movement within the drainage network, pipe sizing and the controlled transport of discharge to downstream drainage points. In building services, this type of system typically collects waste water from sanitary appliances and carries it toward primary drainage routes.

Why this part matters

• It applies to waste water drainage systems operating under gravity inside buildings.
• Its field of application includes residential, commercial, institutional and industrial buildings.
• It acknowledges that plumbing practice varies across Europe and therefore describes major system families without attempting to detail every design nuance.
• It points readers to additional technical documents listed in Annex A for more detailed information.

As a result, TS EN 12056-1 serves as a shared performance-oriented reference point for indoor drainage systems, helping define the general technical language used alongside the more detailed documents that address specific system arrangements.