BS EN 12056-5:2000

Foreword
1 Scope
2 Normative references
3 Definitions
      3.1 General
             3.1.1 Waste water
             3.1.2 Domestic waste water
             3.1.3 Trade effluent
             3.1.4 Grey water
             3.1.5 Black water
             3.1.6 Rainwater
             3.1.7 Flood level
             3.1.8 Drainage system
             3.1.9 Combined system
             3.1.10 Separate system
      3.2 Pipes and fittings
             3.2.1 Sanitary pipework
             3.2.2 Nominal diameter (DN)
             3.2.3 Internal diameter (di)
             3.2.4 External diameter (da)
             3.2.5 Minimum internal diameter (di min)
             3.2.6 Branch discharge pipe
             3.2.7 Square entry
             3.2.8 Swept entry
             3.2.9 Connection bend
             3.2.10 Discharge stack
             3.2.11 Stack offset
             3.2.12 Drain
             3.2.13 Filling degree
      3.3 Ventilating pipework and fittings
             3.3.1 Ventilating pipe
             3.3.2 Branch ventilating pipe
             3.3.3 Stack vent
             3.3.4 Ventilating stack
             3.3.5 Air admittance valve
      3.4 Appliances
             3.4.1 Domestic sanitary appliances
             3.4.2 Non-domestic sanitary appliances
             3.4.3 Floor gully
             3.4.4 Trap
             3.4.5 Depth of water seal (H)
      3.5 Calculation
             3.5.1 Discharge unit (DU)
             3.5.2 Frequency factor (K)
             3.5.3 Waste water flow rate (Qww)
             3.5.4 Continuous flow rate (Qc)
             3.5.5 Pumped water flow rate (Qp)
             3.5.6 Total flow rate (Qtot)
             3.5.7 Hydraulic capacity (Qmax)
             3.5.8 Air flow rate (Qa)
4 Storage and transport
5 General requirements
      5.1 General
      5.2 Waste water discharge pipework
      5.3 Gradient
      5.4 Sanitary precautions
      5.5 Safety precautions
      5.6 Stability of sanitary pipework
6 Installation of waste water pipes
      6.1 Fixing
      6.2 Jointing
      6.3 Fixing and supporting
      6.4 Changes of directions and branch pipe
             connections
      6.5 Connection of pipes of different materials and
             sizes
      6.6 Thermal movement
      6.7 Installation in concrete or other fills
7 Installation of sanitary appliances
      7.1 Fixing
      7.2 Connection
8 Fire protection
9 Sound insulation
10 Instructions for operation, maintenance and use
11 Testing
Annex A (informative)
      A.1 - National and local regulations and practice

Applies to waste water drainage systems operating under gravity. Applicable to drainage systems inside dwellings, commercial, institutional and industrial buildings. A variety of systems have been developed due to the differences in plumbing in Europe. Sets out principles to be followed when installing and maintaining waste water and rainwater gravity drainage systems. Deals with support, fixing, containment of thermal movement, protection and accessibility of the system.

This European Standard applies to waste water drainage systems which operate under gravity. It is applicable for drainage systems inside dwellings, commercial, institutional and industrial buildings.

Differences in plumbing within Europe have led to a variety of systems being developed. Some of the major systems in use are described but this standard has not attempted to detail the intricacies of each system. Detailed information additional to that contained in this standard may be obtained by referring to the technical documents listed in Annex A.

This fifth part of the standard sets out the principles, which should be followed when installing and maintaining waste water and rainwater gravity drainage systems. It deals with fixing, support, containment of thermal movement, protection and accessibility of the system.

All drawings in this standard are given as examples and are not intended to exclude any other system configuration.