Access Junctions, Pipes, Anti-Flood Gullies and Back Traps Explained

Important Components in Commercial Drainage


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



Joining Multiple Lines


Access junctions connect several pipes and provide entry points for inspections. Located at planned positions, they streamline fault finding and clearing blockages. Without them, upkeep in extensive networks would be time-consuming.



Making Maintenance Straightforward


Access pipes are vertical installations that allow direct entry into the system. Installed at regular points, they help to remove obstructions and carry out routine checks. They can also double up as emergency points, reducing the chance of wastewater causing issues indoors.



Defending Against Flooding


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



Preventing Backflow


Back traps act as barriers to block wastewater reversing back into the network. Placed in key positions, they help hygiene, control odours, and prevent 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.

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

  • 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.



Key Details


Drainage in commercial properties relies on a combination of components. Access junctions, access pipes, anti-flood gullies and back traps each support systems safe. Whether upgrading existing systems, these parts reduce risk and safeguard property. For professional advice and products, consult Knowles Drainage.

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