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  1. willemeulen

    large sewer siphon

    Busy with a designing a rising main for sewer. Bumped into another sewer outfall and thought it was a pump line as well. Informing with the the service authority (counsel) they told me it is a siphon!? I've seen siphon's in cases where gravity sewer needs to pass another gravity service like...
  2. willemeulen

    Flat slopes on sewer outfall using HDPE

    The sewer size would start of with a Ø630mm and become larger towards the end, all in all the sewer will be approximately 15km long. It't the dolomite specifications which state HDPE or Steel needs to be used. My feel is that HDPE is suitable for the smaller pipe sizes as it come in rolls of 50...
  3. willemeulen

    Flat slopes on sewer outfall using HDPE

    Hi, Read some of the other thread's and found the consensus was that for bulk outfall sewer on can go up to slopes of 0.1 - 0.08%. The area I'm working in has dolomite; dolomite areas have the renowned sink holes. Most sink holes are cavities in the soil which can collapse, the collapse is...
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