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BS EN 12056-2:2000

Current

Current

The latest, up-to-date edition.

Gravity drainage systems inside buildings Sanitary pipework, layout and calculation

Available format(s)

Hardcopy , PDF

Language(s)

English

Published date

09-15-2000

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 Discharge stack
             3.2.10 Discharge stack
             3.2.11 Stack offset
             3.2.12 Drain
             3.2.13 Filling degree
      3.3 Ventilating pipework
             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 System configurations
      4.1 General
      4.2 System types
      4.3 Configurations
             4.3.1 Primary ventilated system
                      configurations
             4.3.2 Secondary ventilated system
                      configurations
             4.3.3 Unventilated discharge branch
                      configurations
             4.3.4 Ventilated discharge branch
                      configurations
5 Layout rules
      5.1 Compliance with European Standards
      5.2 Protection against flooding
      5.3 Odour
      5.4 Trap seal
      5.5 Reduction of nominal diameter
      5.6 Ventilation
      5.7 Air admittance valves
6 Calculation
      6.1 General
      6.2 Basic data
             6.2.1 Pipe diameter
             6.2.2 Discharge units
             6.2.3 Discharge from non-domestic sanitary
                      appliances
      6.3 Calculation of flowrate
             6.3.1 Waste water flowrate (Qww)
             6.3.2 Frequency factor (K)
             6.3.3 Total flowrate (Qtot)
             6.3.4 Calculation rules
      6.4 Layout of branches
             6.4.1 Unventilated discharge branches
             6.4.2 Ventilated discharge branches
             6.4.3 Air admittance valves for branches
      6.5 Layout of discharge stacks
             6.5.1 Primary ventilated discharge stacks
             6.5.2 Secondary ventilated discharge stacks
             6.5.3 Air admittance valves for stacks
             6.5.4 Ventilating pipework
      6.6 Layout of drains
Annex A (informative)
      A.1 - National and local regulations and practice
Annex B (informative)
      B.1 - Capacities of drains
      B.2 - Values of waste water flow rates
Annex C (informative)
      C.1 - Calculation example
      C.2 - Data and parameters
      C.3 - Sum of discharge units
      C.4 - Calculation of the stack size
      C.5 - Calculation of the drain sizes
Annex D (informative)
      D.1 - European Standards of commonly used products and
            additional European Standards in the field of
            waste water systems

Applies to waste water drainage systems operating under gravity. Applicable to drainage systems inside dwellings and institutional, industrial and commercial buildings. Details principles to be followed both for layout and calculation.

Committee
B/505
DevelopmentNote
Supersedes BS 5572(1994). (08/2000) Supersedes 95/106291 DC. (08/2004)
DocumentType
Standard
Pages
88
PublisherName
British Standards Institution
Status
Current
Supersedes

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 second part of the standard sets out principles which shall be followed for both layout and calculation. It makes limited provision for drainage systems conveying trade effluent and also makes limited provision for fluids removed by pumps.

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

Standards Relationship
UNE-EN 12056-2:2001 Identical
NF EN 12056-2 : 2000 Identical
UNI EN 12056-2 : 2001 Identical
NBN EN 12056-2 : 2000 Identical
NS EN 12056-2 : 1ED 2000 Identical
DIN EN 12056-2:2001-01 Identical
SN EN 12056-2 : 2001 Identical
EN 12056-2:2000 Identical
I.S. EN 12056-2:2000 Identical

07/30138205 DC : DRAFT MAR 2007 BS 6297 - DESIGN AND INSTALLATION OF SMALL SEWAGE TREATMENT WORKS AND CESSPOOLS - CODE OF PRACTICE
15/30253829 DC : 0 BS 3632 - RESIDENTIAL PARK HOMES - SPECIFICATION
BS 6465-3:2006 Sanitary installations Code of practice for the selection, installation and maintenance of sanitary and associated appliances
BS 6173:2009 Specification for installation and maintenance of gas-fired catering appliances for use in all types of catering establishments (2nd and 3rd family gases)
BS 6297(2007) : 2007 CODE OF PRACTICE FOR THE DESIGN AND INSTALLATION OF DRAINAGE FIELDS FOR USE IN WASTEWATER TREATMENT
BS 6465-1(2006) : 2006 SANITARY INSTALLATIONS - PART 1: CODE OF PRACTICE FOR THE DESIGN OF SANITARY FACILITIES AND SCALES OF PROVISION OF SANITARY AND ASSOCIATED APPLIANCES
BS 6100-7:2008 Building and civil engineering. Vocabulary Services
04/30087610 DC : DRAFT OCT 2004 BS 6100-8 - BUILDING AND CIVIL ENGINEERING - VOCABULARY - PART 8: SERVICES
BS 6465-2:2017 Sanitary installations Space recommendations. Code of practice
BS 6100-0:2010 Building and civil engineering. Vocabulary Introduction and index
BS 8525-1:2010 Greywater systems Code of practice
BS EN 12056-3:2000 Gravity drainage systems inside buildings Roof drainage, layout and calculation
05/30057907 DC : DRAFT SEP 2005 BS 6465-1 - SANITARY INSTALLATIONS - PART 1: CODE OF PRACTICE FOR DESIGN OF SANITARY FACILITIES AND SCALE OF PROVISION OF SANITARY APPLIANCES
09/30184122 DC : 0 BS 8525-1 - GREYWATER SYSTEMS - PART 1: CODE OF PRACTICE
BS 5502-25:1991 Buildings and structures for agriculture Code of practice for design and installation of services and facilities
08/30177380 DC : 0 BS 6173 - INSTALLATION AND MAINTENANCE OF GAS-FIRED CATERING APPLIANCES FOR USE IN ALL TYPES OF CATERING ESTABLISHMENTS (2ND AND 3RD FAMILY GASES)
BS EN 12056-5:2000 Gravity drainage systems inside buildings Installation and testing, instructions for operation, maintenance and use
BS EN 12056-1:2000 Gravity drainage systems inside buildings General and performance requirements

EN 877:1999/A1:2006/AC:2008 CAST IRON PIPES AND FITTINGS, THEIR JOINTS AND ACCESSORIES FOR THE EVACUATION OF WATER FROM BUILDINGS - REQUIREMENTS, TEST METHODS AND QUALITY ASSURANCE
EN 35:2014 PEDESTAL AND WALL-HUNG BIDETS WITH OVER-RIM SUPPLY - CONNECTING DIMENSIONS
EN 295-3:2012 Vitrified clay pipe systems for drains and sewers - Part 3: Test methods
EN 329 : 1993 SANITARY TAPWARE - WASTE FITTINGS FOR SHOWER TRAYS - GENERAL TECHNICAL SPECIFICATIONS
EN 411 : 1995 SANITARY TAPWARE - WASTE FITTINGS FOR SINKS - GENERAL TECHNICAL SPECIFICATIONS
BS 1710:1984 Specification for identification of pipelines and services
EN 681-1:1996/A3:2005 ELASTOMERIC SEALS - MATERIALS REQUIREMENTS FOR PIPE JOINT SEALS USED IN WATER AND DRAINAGE APPLICATIONS - PART 1: VULCANIZED RUBBER
EN 274 : 1992 SANITARY TAPWARE - WASTE FITTINGS FOR BASINS, BIDETS AND BATHS - GENERAL TECHNICAL SPECIFICATIONS
EN 752-3 : 1996 DRAIN AND SEWER SYSTEMS OUTSIDE BUILDINGS - PART 3: PLANNING
EN 251:2012 Shower trays - Connecting dimensions
EN 34 : 1992 WALL HUNG W.C. PAN WITH CLOSE COUPLED CISTERN - CONNECTING DIMENSIONS
EN 1566-1:1998 Plastics piping systems for soil and waste discharge (low and high temperature) within the building structure - Chlorinated poly(vinyl chloride) (PVC-C) - Part 1: Specifications for pipes, fittings and the system
EN 598:2007+A1:2009 Ductile iron pipes, fittings, accessories and their joints for sewerage applications - Requirements and test methods
EN 1671:1997 Pressure sewerage systems outside buildings
BS EN 12056-4:2000 Gravity drainage systems inside buildings Wastewater lifting plants. Layout and calculation
PREN 249 : DRAFT 2009 SANITARY APPLIANCES - SHOWER TRAYS MADE FROM CROSSLINKED CAST ACRYLIC SHEETS - REQUIREMENTS AND TEST METHODS
BS 7671:1992 REQUIREMENTS FOR ELECTRICAL INSTALLATIONS
EN 198:2008 Sanitary appliances - Baths made from crosslinked cast acrylic sheets - Requirements and test methods
EN 295-7:2013 Vitrified clay pipe systems for drains and sewers - Part 7: Requirements for pipes and joints for pipe jacking
EN 752-6 : 1998 DRAIN AND SEWER SYSTEMS OUTSIDE BUILDINGS - PUMPING INSTALLATIONS
EN 695:2005 Kitchen sinks - Connecting dimensions
PREN 12050-1 : DRAFT 2012 WASTEWATER LIFTING PLANTS FOR BUILDINGS AND SITES - PART 1: LIFTING PLANTS FOR WASTEWATER CONTAINING FAECAL MATTER
PREN 12050-3 : DRAFT 2012 WASTEWATER LIFTING PLANTS FOR BUILDINGS AND SITES - PART 3: LIFTING PLANTS FOR LIMITED APPLICATIONS
EN 295-6:2013 Vitrified clay pipes systems for drain and sewers - Part 6: Requirements for components of manholes and inspection chambers
PREN 12050-2 : DRAFT 2012 WASTEWATER LIFTING PLANTS FOR BUILDINGS AND SITES - PRINCIPLES OF CONSTRUCTION AND TESTING - PART 2: LIFTING PLANTS FOR FAECAL-FREE WASTEWATER
EN 232:2012 Baths - Connecting dimensions
EN 31:2011+A1:2014 Wash basins - Connecting dimensions
PREN 12200-1 : DRAFT 2014 PLASTICS RAINWATER PIPING SYSTEMS FOR ABOVE GROUND EXTERNAL USE - UNPLASTICIZED POLY(VINYL CHLORIDE) (PVC-U) - PART 1: SPECIFICATIONS FOR PIPES, FITTINGS AND THE SYSTEM
EN 12531:1998 Castors and wheels - Hospital Bed Castors
EN 752-2 : 1996 DRAIN AND SEWER SYSTEMS OUTSIDE BUILDINGS - PERFORMANCE REQUIREMENTS
BS EN 12056-3:2000 Gravity drainage systems inside buildings Roof drainage, layout and calculation
EN 1253-2:2015 GULLIES FOR BUILDINGS - PART 2: ROOF DRAINS AND FLOOR GULLIES WITHOUT TRAP
EN 752-5 : 1997 DRAIN AND SEWER SYSTEMS OUTSIDE BUILDINGS - REHABILITATION
PREN 1825-1 : DRAFT 1995 INSTALLATIONS FOR SEPARATION OF GREASE - PRINCIPLES OF DESIGN, PERFORMANCE AND TESTING, MARKING AND QUALITY CONTROL
EN 1455-1:1999 Plastics piping systems for soil and waste discharge (low and high temperature) within the building structure - Acrylonitrile-butadiene-styrene (ABS) - Part 1: Requirements for pipes, fittings and the system
BS EN 12056-5:2000 Gravity drainage systems inside buildings Installation and testing, instructions for operation, maintenance and use
EN 752-1 : 1995 DRAIN AND SEWER SYSTEMS OUTSIDE BUILDINGS - PART 1: GENERALITIES AND DEFINITIONS
PREN 12764 : DRAFT 2014 SANITARY APPLIANCES - SPECIFICATION FOR WHIRLPOOL BATHS
EN 773:1999 General requirements for components used in hydraulically pressurized discharge pipes, drains and sewers
BS EN 12056-1:2000 Gravity drainage systems inside buildings General and performance requirements
EN 295-2:2013 Vitrified clay pipe systems for drains and sewers - Part 2: Evaluation of conformity and sampling
EN 12666-1:2005+A1:2011 Plastics piping systems for non-pressure underground drainage and sewerage - Polyethylene (PE) - Part 1: Specifications for pipes, fittings and the system
EN 752:2017 Drain and sewer systems outside buildings - Sewer system management
EN 12109:1999 Vacuum drainage systems inside buildings
EN 295-4:2013 Vitrified clay pipe systems for drains and sewers - Part 4: Requirements for adaptors, connectors and flexible couplings
EN 1519-1:1999 Plastics piping systems for soil and waste discharge (low and high temperature) within the building structure - Polyethylene (PE) - Part 1: Specifications for pipes, fittings and the system
EN 858-1:2002/A1:2004 SEPARATOR SYSTEMS FOR LIGHT LIQUIDS (E.G. OIL AND PETROL) - PART 1: PRINCIPLES OF PRODUCT DESIGN, PERFORMANCE AND TESTING, MARKING AND QUALITY CONTROL
EN 588-1:1996 Fibre-cement pipes for sewers and drains - Part 1: Pipes, joints and fittings for gravity systems
EN 752-4 : 1997 DRAIN AND SEWER SYSTEMS OUTSIDE BUILDINGS - PART 4: HYDRAULIC DESIGN AND ENVIRONMENTAL CONSIDERATIONS
EN 1610:2015 Construction and testing of drains and sewers
PD 6484:1979 Commentary on corrosion at bimetallic contacts and its alleviation
EN 1123-1:1999/A1:2004 PIPES AND FITTINGS OF LONGITUDINALLY WELDED HOT-DIP GALVANIZED STEEL PIPES WITH SPIGOT AND SOCKET FOR WASTE WATER SYSTEMS - PART 1: REQUIREMENTS, TESTING, QUALITY CONTROL
EN 1124-1:1999/A1:2004 PIPES AND FITTINGS OF LONGITUDINALLY WELDED STAINLESS STEEL PIPES WITH SPIGOT AND SOCKET FOR WASTE WATER SYSTEMS - PART 1: REQUIREMENTS, TESTING, QUALITY CONTROL
EN 545:2010 Ductile iron pipes, fittings, accessories and their joints for water pipelines - Requirements and test methods
EN 1293:1999 General requirements for components used in pneumatically pressurized discharge pipes, drains and sewers
EN 263:2008 Sanitary appliances - Crosslinked cast acrylic sheets for baths and shower trays for domestic purposes
EN 1565-1:1998 Plastics piping systems for soil and waste discharge (low and high temperature) within the building structure - Styrene copolymer blends (SAN+PVC) - Part 1: Specifications for pipes, fittings and the system
EN 295-1:2013 Vitrified clay pipe systems for drains and sewers - Part 1: Requirements for pipes, fittings and joints
PREN 1453-1 : DRAFT 2014 PLASTICS PIPING SYSTEMS WITH STRUCTURED-WALL PIPES FOR SOIL AND WASTE DISCHARGE (LOW AND HIGH TEMPERATURE) INSIDE BUILDINGS - UNPLASTICIZED POLY(VINYL CHLORIDE) (PVC-U) - PART 1: SPECIFICATIONS FOR PIPES AND THE SYSTEM
EN 752-7 : 1998 DRAIN AND SEWER SYSTEMS OUTSIDE BUILDINGS - MAINTENANCE AND OPERATIONS

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