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Drainage & Piped Services Standard Specification
Version 2014-1

Below Ground Foul Wastewater Gravity Drainage Pipeline System

System Performance: Design of below ground gravity drainage pipeline systems type A.
System manufacturer: Polypipe Terrain or equal and approved
Pipelines:

Pipes, bends and junctions: PVC-U solid wall below ground drainage pipelines for flexible
jointing type B;
PVC-U structured wall below ground drainage pipelines for flexible jointing type B;
and Vitrified clay plain wall below ground drainage pipelines for flexible jointing type B.
Pipeline accessories:

System Performance

Design of below ground gravity drainage pipeline systems type A

Design: Complete the design of the below ground drainage system in accordance with BS EN 752, BS EN
1295-1 and BS EN 1610.
Assumed ground conditions: To be confirmed by site investigation
Performance criteria:

Vehicle load capacity (minimum):
Permanent construction:
Temporary construction: Trench bridging as necessary to prevent construction traffic
damaging pipes after backfilling.

Stormwater run-off capacity:
Requirement: Submit proposals including detailed design drawings, technical information, calculations and
manufacturers’ literature.

Products

PVC-U solid wall below ground drainage pipelines for flexible jointing type B

Manufacturer:
Standard: To BS EN 1401-1.
Third party certification:
Class:
Application area code: UD.
Recycled content:
Sizes (nominal):
Jointing type:
Integral accessories:

PVC-U structured wall below ground drainage pipelines for flexible jointing type B

Manufacturer: Polypipe Terrain or equal and approved
Standards: To BS EN 13476-1 and BS EN 13476-2 or BS EN 13476-3;
Type A, to BS EN 13476-1 and BS EN 13476-2;
and Type B, to BS EN 13476-1 and BS EN 13476-3.
Third party certification: BBA Agreement certificate.
Material: PVC-U.
Puncture resistance and longitudinal bending: To WIS 04-35-01:2008.
Recycled content:

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