Page 40 - McD_ROTF DRAINAGE & PIPED SERVICES_Neat

Drainage & Piped Services Standard Specification
Version 2014-1

 Spigots: Type and direction to suit pipelines with suitable adaptors and connections.
 Integral accessories: Flange and clamping collar for roof membrane;

Insulation jackets; Raising pieces to suit insulation thicknesses;
Support plates; and Underdeck clamps.
 Execution: Installing gravity rainwater outlets.

Unplasticized polyvinyl chloride (PVC-U) above ground drainage pipelines type A
 Manufacturer: Polypipe Terrain of equal and approved
 Standard: To BS 4514 and To BS EN 1329-1.
 Third party product certification: BSI Kitemark certified.
 Nominal sizes: DN 100.
 Colour: Grey.
 Integral accessories: Access fittings; Plastics cages; and Weathering collars.

Brackets and clips for above ground drainage pipelines type B
 Manufacturer: Polypipe Terrain or equal and approved
 Pipe location: External and Internal.
 Arrangement: Horizontal and Vertical.
 Form: Anchor and guide brackets for low gradient internal pipes;

Hanging rail system;
and Standoff pipe clips.
 Material: Manufacturer's standard.
 Finish: To match pipelines.
 Fasteners: Coach screws and Round head wood screws.

Identifying pipework type A
 Manufacturer: Submit proposals.
 Standards: To BS 1710.
 Identification type: Adhesive colour bands.
 Execution: Installing identification on pipework.

Execution

Installation of rainwater drainage generally
 Collection and distribution of rainwater: Complete, and without leakage or noise nuisance.
 Electrolytic corrosion: Avoid contact between dissimilar metals where corrosion may occur.
 Plastics and galvanized steel pipes: Do not bend.
 Allowance for thermal and building movement: Provide and maintain clearance as fixing and

jointing proceeds.
 Protection: Fit purpose-made temporary caps to prevent ingress of debris. Fit access covers,

cleaning eyes and blanking plates as the work proceeds.

Access for testing and maintenance of rainwater drainage system

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