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350 MUPVC OR PVC-C PIPEWORK generally
• Material and standard:
- MUPVC: To BS 5255 and Kitemark certified; or
- PVC-C: To BS EN 1566-1, and Kitemark certified.
Application area code: B.
Opening dimensions of access fittings, design of swept fittings, stand off
dimensions of pipe and fitting brackets and requirements for adaptors and plugs:
To BS 4514.
• Manufacturer: Contractor's choice.
- Product reference: Contractor's choice.
• Nominal sizes: site specific.
• Colour: site specific.
• Brackets: Plastics pipe clips, colour to match pipes.
- Fixings: Stainless steel screws.
Size: site specific.
• Accessories: Access fittings.

355 POLYPROPYLENE PIPEWORK generally
• Standard:
- To BS 5255 and Kitemark certified; or
- To BS EN 1451-1 and Kitemark certified.
Application area code: B.
Opening dimensions of access fittings, design of swept fittings, stand off
dimensions of pipe and fitting brackets and requirements for adaptors and plugs:
To BS 4514.
• Manufacturer: Contractor's choice.
- Product reference: Contractor's choice.
• Nominal sizes: site specific.
• Colour: site specific.
• Brackets: Plastics pipe clips, colour to match pipes.
- Fixings: Stainless steel screws.
Size: site specific.
• Accessories: Access fittings.

365 PVC-U PIPEWORK generally
• Standard: To BS EN 1329-1, Kitemark certified.
- Weather resistance, connectors to WC pans, opening dimensions of access
fittings, design of swept fittings, stand off dimensions of pipe and fitting brackets
and requirements for adaptors and plugs: To BS 4514.
• Manufacturer: Contractor's choice.
- Product reference: Contractor's choice.
• Nominal size: site specific.
• Colour: site specific.
• Brackets: Plastics pipe clips, colour to match pipes.
- Fixings: Stainless steel screws.
Size: site specific.
• Accessories: Access fittings.

375 AIR ADMITTANCE VALVES 6118-AEW-XX-XX-NBS-A-01
• Standard: To BS EN 12380 or Agrément certified.
• Minimum air flow rate: To BS EN 12056-2.
• Manufacturer: Contractor's choice.
- Product reference: Contractor's choice.

RotF generic (intermediate) NBS 2014