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

Important Components in Commercial Drainage


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



Joining Multiple Lines


Access junctions link several pipes and create entry points for maintenance. Located at planned positions, they make easier fault finding and resolving blockages. Without them, upkeep in complex networks would be difficult.



Keeping Access Simple


Access pipes are vertical sections that allow direct entry into the system. Installed at regular points, they make it easier to deal with obstructions and carry out routine checks. They can also act as overflow outlets, reducing the chance of wastewater causing issues indoors.



Keeping Water Under Control


Anti-flood gullies block surface water overwhelming drains. Practical in areas with frequent heavy rain, they keep water flowing in the right direction, avoiding the risk of damage. For businesses, this helps limit downtime.



Keeping Wastewater Moving Correctly


Back traps act as barriers to block wastewater reversing back into the network. Placed in critical positions, they maintain hygiene, limit odours, and avoid contamination inside commercial areas.



Frequently Asked Questions (FAQs)



  • What is the purpose of access junctions?
    They help locate and fix blockages quickly.

  • Why are access pipes fitted?
    They provide vertical access points.

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  • How do anti-flood gullies work?
    They prevent surface water entering the system.

  • What is a back trap?
    It prevents wastewater flowing back.

  • Are anti-flood gullies suitable for wet climates?
    Yes, they are effective where heavy rainfall occurs.



Final Notes


Drainage in commercial properties relies on a series of components. Access junctions, access pipes, anti-flood gullies and back traps each maintain systems operational. Whether planning new systems, these parts minimise risk and protect property. For professional advice and products, contact Knowles Drainage.

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