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  1. #1
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    Default DWV or Stormwater

    Apologies as Im sure this has been answered a thousand times although I promise I did attempt to find the answer earlier through some searching on this forum. Anyhow, my question relates to which PVC fittings I should be running on my extraction rebuild. I intend to use 150 PVC Stormwater pipe but should the fittings be DWV or Stormwater? I found in an earlier thread reference to strongly preferring DWV 90 deg elbows over Stormwater but what about other fittings such as 45 junctions (Y) fittings, elbows other than 90 degrees etc? Is there any difference between Stormwater and DWV on these or is it simply a cost decision?
    Thanks in advance.

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  3. #2
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    Default

    Quote Originally Posted by Flindersia View Post
    Apologies as Im sure this has been answered a thousand times
    Yep is has.

    which PVC fittings I should be running on my extraction rebuild. I intend to use 150 PVC Stormwater pipe but should the fittings be DWV or Stormwater? I found in an earlier thread reference to strongly preferring DWV 90 deg elbows over Stormwater but what about other fittings such as 45 junctions (Y) fittings, elbows other than 90 degrees etc? Is there any difference between Stormwater and DWV on these or is it simply a cost decision?
    DWV is designed to be stronger than Storm water but DWV MAY be more expensive but not much strength is needed to carry air with a bit of dust in it under teh relatively low pressures generated by DCs. Some inspection fittings are only available as DWV

    DVW and Stormwater are interchangeable so some stores only carry the DWV fitting for certain sizes/shape. You are permitted to put DWV onto storm water systems but not VV and it saves them carrying the same thing for both systems.

    The only fitting I would be specific about is the DWV "long radius 90 bend as they are much more efficient even given the the extra $ compared to the short stubby 90 bends for stormwater and 2 x 45 bends in either . There are no long radius bends available for Stormwater as far as I know. Details in this thread.

    Look here
    Ducting update.
    and here
    Air flow calibration measurements

    In fact then ends of both the threads has a heap of info on bends and flexies etc
    It must be time to change my signature again.

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