NF EN 12056-4 : 2000

Foreword
1 Scope
2 Normative references
3 Definitions, symbols, units and designation
      3.1 Definitions
             3.1.1 Wastewater lifting plant
             3.1.2 Backflow
             3.1.3 Flood level
             3.1.4 Backflow loop
             3.1.5 Duty flow Vp
             3.1.6 Discharge head, Hp
             3.1.7 Collection tank for wastewater
                      containing faecal matter
             3.1.8 Useful volume
      3.2 Symbols
4 Protection against backflow
5 Installation
      5.1 General requirements
      5.2 Pipework
      5.3 Ventilation
      5.4 Drains
      5.5 Electrical connections
6 Selection of wastewater lifting plants
      6.1 Determination of flow, Qp
      6.2 Determination of head, Hp
             6.2.1 Calculation procedure for head, Hp
             6.2.2 Static head, Hgeo
             6.2.3 Losses in valves and fittings, Hv,a
             6.2.4 Friction losses in discharge pipework,
                      Hv,r
      6.3 Determination of useful volume, V
7 Commissioning
8 Inspection and maintenance
      8.1 Inspection
      8.2 Maintenance
      8.3 Maintenance contract
Annex A (informative) Bibliography

Gives operation, layout and maintenance requirements for lifting plants for wastewater containing faecal matter, faecal-free wastewater and rainwater within buildings and sites, together with their discharge pipework and connection to drain. Also covers faecal wastewater lifting plants for limited applications.