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 clear function. Access junctions, access pipes, anti-flood gullies more info and back traps all help in keeping the system efficient and reliable over time.



Joining Multiple Lines


Access junctions link several pipes and create entry points for maintenance. Located at appropriate positions, they streamline fault finding and clearing blockages. Without them, upkeep in large networks would be labour-intensive.



Providing Entry for Inspections


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



Keeping Water Under Control


Anti-flood gullies stop surface water overwhelming drains. Useful in areas with frequent heavy rain, they ensure water flowing in the right direction, minimising the risk of overflow. For businesses, this helps protect property.



Keeping Wastewater Moving Correctly


Back traps work as barriers to block wastewater reversing back into the network. Placed in critical positions, they support hygiene, reduce odours, and prevent 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 provide vertical access points.

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

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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 designed for flood-prone conditions.



Final Notes


Drainage in business properties relies on a set of components. Access junctions, access pipes, anti-flood gullies and back traps each help keep systems efficient. Whether upgrading existing systems, these parts minimise risk and protect property. For professional advice and products, consult Knowles Drainage.

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