CPM has developed an Off-Site solution for the requirement of installing a dry-flow channel into concrete flexible jointed pipes.

The machine made one-piece solution is available in a 1500mm diameter with channel options of 150mm, 225mm and 300mm.

Benefits of the system include:
  • Removes the problem of confined space working.
  • Considerable reduction in on-site construction time.
  • Can reduce costs associated with in-situ construction by 50%.
  • Can reduce over-pumping costs by 15%.
  • Can be included as part of Off-Site Attentuation components
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  • How frequent should I be testing the pipeline during installation?

    It is highly recommended to test the pipeline every 3 or 4 pipes laid as an absolute minimum (do not wait until whole line is installed before carrying out such test).

  • What are the recommended minimum depths of cover for concrete pipes?

    Minimum depth of cover to top of pipes is 0.6m with bedding class S (360o granular bedding). For cover depths less than 0.6m, then the pipeline should be protected with either a full concrete surround, or a reinforced concrete slab should be placed over it (spanning sufficient distance onto trench walls).

  • What is the most likely cause of air test failure for a concrete pipeline on site?

    Common causes of air tests failures include:

    • Displaced seals (usually due to use of wrong pipe lubrication during installation).
    • Poor laying technique.
    • Faulty testing equipment.
    • Poor seal between testing equipment and face of concrete pipe.
  • What is the recommended maximum jetting pressure acceptable for concrete products?

    5000 psi is the generally accepted maximum, although higher pressure can be accommodated by concrete drainage products.

  • What materials can be used as backfill for a concrete pipeline?

    In many situations the ‘as-dug’ trench material is suitable for backfill (should be readily compactable and free from large boulders etc).

Got a question?

To find out more about Dry Weather Flow Pipes, please call our Sales Team or fill out the enquiry form and we’ll get back to you within 24 hours.

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