Page 38 - McD_ROTF DRAINAGE & PIPED SERVICES_Neat

Drainage & Piped Services Standard Specification
Version 2014-1

Internal Gravity Rainwater Drainage System - Type A
 System Performance: Design of gravity rainwater drainage system type A.
 System manufacturer: [Polypipe Terrain Ltd. or equal and approved]
 Roof gutters:
 Gutters:
 Gutter types: By others
 Jointing:
 Electrical continuity:
 Supports:
 Brackets:
 Fixings:
 Rainwater outlets: Gravity rainwater outlets.
 Internal rainwater pipework:
 Rainwater downpipes:
 Downpipe types: Unplasticized polyvinyl chloride (PVC-U) above ground drainage pipelines type A.
 Jointing: Integral push fit ring seal sockets and Solvent weld.
 Supports:
 Brackets and clips: Brackets and clips for above ground drainage pipelines type B.
 Fixings: Stainless steel screws.
 Warning pipes: Required
 System accessories: Identifying pipework type A.
 Execution: Installation of rainwater drainage generally and Access for testing and maintenance of

rainwater drainage system.
 System Completion:

Rainwater drainage internal pipework test – England, Wales, Ireland and Northern Ireland
 Preparation: Temporarily seal open ends of pipework with plugs.
 Test apparatus: Connect a ‘U’ tube water gauge and air pump to pipework via a plug.
 Testing: Pump air into pipework until gauge registers 38 mm.
 Required performance: After a period for temperature stabilization, maintain the pressure of 38

mm without loss for at least 3 minutes.

Rainwater drainage internal pipework test – Scotland
 Testing:

 Standard: To BS EN 12056-3, National annex NE.4.2.
 Method: Air pressure test.
 Required performance: Pipework to withstand constant pressure of 38 mm water gauge for 3
minutes.

Rainwater drainage system maintenance instructions type A

 Printed instructions: Submit at completion.

 Contents: Recommended procedures for maintenance of the rainwater installation, including full
details of recommended inspection, cleaning and repair procedures.

3/6

McDonalds Restaurants Ltd