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Drainage & Piped Services Standard Specification
Version 2014-1

 Pipelines and fittings: Unplasticized polyvinyl chloride (PVC-U) above ground drainage pipelines
type A.

 Accessories for jointing: Solvent welding cement.
 Supports: Brackets and clips for above ground drainage pipelines type C.
 Accessories for fixing: Stainless steel screws.
 Pipework identification: Identifying pipework type B.

 Fire stopping:
 Floor penetrations: Intumescent collars.
 Wall penetrations: Intumescent collars.
 System accessories: Discharge and ventilating stack terminations and Masking plates type A.
Execution: Installing above ground wastewater drainage systems generally;
Applying above ground wastewater drainage internal pipework identification;
Installing above ground wastewater drainage discharge stack pipework generally;
and Access to above ground wastewater drainage systems for testing and maintenance.

System Completion: Testing above ground wastewater drainage systems generally;
Above ground wastewater drainage system pipework air tightness test;
Above ground wastewater drainage system siphonage and back pressure tests;
Above ground wastewater drainage system pre-handover checks;
Above ground wastewater drainage system submittals;
and Documentation.

System Performance

Design of above ground wastewater drainage systems
 Design: Complete the design of the above-ground wastewater drainage system.
 Standards: To BS EN 12056-1, BS EN 12056-2, relevant parts of BS EN 12056-4, BS EN 12056-5 and

in accordance with BS EN 12056-2 National Annexes NA-NG.
 System configuration:
 Form: System III, single discharge stack system with full bore discharge branch pipes.
Configuration: Primary ventilated stack system;
Secondary ventilated stack system;
Unventilated discharge branches;
and Ventilated discharge branches.
 Design discharges: Commercial kitchen wastewater and Domestic wastewater.
 Design discharge types: Commercial kitchen wastewater and Domestic wastewater.
 Design discharge content: Blackwater and Greywater.
 Recycling requirements: Greywater recycling.
 Requirement: Submit proposals.

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