How many tile drain inlets in a run require a larger pipe?

Discussion in 'Landscape Architecture and Design' started by New2TheGreenIndustry, Feb 17, 2014.

  1. New2TheGreenIndustry

    New2TheGreenIndustry LawnSite Senior Member
    from GA
    Messages: 925

    Is there a rule of thumb for increasing pipe size based on the number of inlets?
  2. F4rm3rj03

    F4rm3rj03 LawnSite Senior Member
    Messages: 362

    Not directly.
    Size should be dictated by variables like expected volume of water, budget, minimum required rate of water flow, slope, & pipe material used.

    The number of inlets do not matter, it is the amount of water coming from those inlets.

    Below are two links with upon glance seemed to contain enough information to give you a good start on calculating when to set up in size. 3 section 3.7.pdf

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