Sewage system usage

• Intermittent usage, e.g. in apartments, guesthouses, offices K=0.5
• Periodic usage, e.g. in hospitals, schools, restaurants, hotels K=0.7
• Collective usage, e.g. public toilets and showers K=1.0
• Special usage, e.g. laboratories K=1.2

Sewage systems

System I - Single stack system with partially filled branches. Sanitary fixtures are connected to partially filled branches. These branches are designed with a filling degree of 0.5 (50%) and are connected to a single stack.

System II - Single stack system with smaller diameter branches. Sanitary fixtures are connected to smaller diameter branches. These branches are designed with a filling degree of 0.7 (70%) and are connected to a single stack.

System III - Single stack system with fully filled branches. Sanitary fixtures are connected to fully filled branches. These branches are designed with a filling degree of 1.0 (100%) and each branch is connected separately to the stack.

System IV - Separate stack system. Each sewage system type I, II and III can also be divided into a stack for black water from flush toilets and urinals and a stack for grey water from other sanitary fixtures.