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  1. jh118

    Water Main Surge Relief Valve

    Not to sound stupid, but why does opening the surge anticipation valve during a negative pressure wave exacerbate the downsurge? I am working on a sewage pump station modification right now where they have surge anticipation valves. I need to make recommendations on their optimal timing and...
  2. jh118

    CMP point repair

    I am investigating methods to point repair a 60" CMP sanitary interceptor. The crown of the pipe has corroded and is failing in some areas. The sections are limited in length (usually 5-6' long). Is anyone familiar with methods of reparing the pipe short of direct replacement?
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