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Drainage & Piped Services Standard Specification
Version 2014-1

 Wording: White lettering 'FOUL DRAINAGE' on a black background.
 Greywater in system with recycling:
 Definition: As defined in BS EN 12056-1, clause 3.1.
 Direction of flow: Black arrow on light grey background.
 Wording: Black lettering 'GREYWATER' on a light grey background.

Installing above ground wastewater drainage discharge stack pipework generally
 Pipework:
 Alignment: Fix securely plumb and true to line.
 Externally socketed pipes and fittings: Fix with sockets facing upstream.
 Vertical pipes: Provide a load bearing support not less than every storey level. Locate at or close

below socket collar or coupling. Tighten fixings as work proceeds so that every storey is self-
supporting.
 Additional supports: Provide as necessary to support junctions and changes in direction.
 Wall and floor penetrations:
 Isolating pipework: Isolate pipework from structure, e.g. with pipe sleeves.
 Masking plates: Fix at penetrations if visible in the finished work.
 Expansion joint sockets: Fix rigidly to the building.
 Fixings: Allow the pipe to slide.

Access to above ground wastewater drainage systems for testing and maintenance
 General: Install pipework with adequate clearance to permit testing, cleaning and maintenance,

including painting where necessary.
 Access fittings and rodding eyes: Position to avoid obstruction.

System Completion

Testing above ground wastewater drainage systems generally
 Dates for testing:
 Notice: Required.
 Period of notice (minimum): 5 working days.
 Preparation:
 Pipework: Securely fixed and free from obstruction and debris.
 Traps: Fill with clean water.
 Testing:
 Water for testing: Supply clean water, assistance and apparatus.
 Smoke for testing: Do not use.
 Records of tests: Submit.

Above ground wastewater drainage system pipework air tightness test
 Preparation:
 Open ends of pipework: Temporarily seal using plugs.

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