Guide to Access Junctions, Pipes, Anti-Flood Gullies and Back Traps

Main Elements of Drainage in Commercial Premises


Commercial drainage systems are made up of multiple components, each with a defined function. Access junctions, access pipes, anti-flood gullies click here and back traps all support in keeping the system functional and robust over time.



Linking Pipework Together


Access junctions connect several pipes and provide entry points for maintenance. Located at strategic positions, they make easier fault finding and clearing blockages. Without them, upkeep in complex networks would be labour-intensive.



Keeping Access Simple


Access pipes are vertical installations that allow direct entry into the system. Installed at set points, they allow professionals to remove obstructions and carry out routine checks. They can also act as safety valves, reducing the chance of wastewater causing issues indoors.



Keeping Water Under Control


Anti-flood gullies prevent surface water overwhelming drains. Effective in areas with frequent heavy rain, they maintain water flowing in the right direction, reducing the risk of overflow. For businesses, this helps limit downtime.



Keeping Wastewater Moving Correctly


Back traps work as barriers to prevent wastewater reversing back into the network. Placed in key positions, they help hygiene, reduce odours, and stop contamination inside commercial areas.



Frequently Asked Questions (FAQs)



  • What is the purpose of access junctions?
    They allow easy cleaning and maintenance.

  • Why are access pipes fitted?
    They make clearing blockages more efficient.

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  • How do anti-flood gullies work?
    They keep drains flowing without backflow.

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  • What is a back trap?
    It ensures waste moves in one direction only.

  • Are anti-flood gullies suitable for wet climates?
    Yes, they are ideal in rainy areas.



Key Details


Drainage in commercial properties relies on a set of components. Access junctions, access pipes, anti-flood gullies and back traps each maintain systems efficient. Whether installing fresh systems, these parts minimise risk and safeguard property. For professional advice and products, consult Knowles Drainage.

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