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  1. scmurphy

    Highly variable flow phasing - Wet well sizing

    We have had a a few phased in developments over the past years but never really had a problem with odor from the lift stations. We usually lower the float switches in the wet well down to very near the bottom then set the "on "switch just above. It causes the pumps to short cycle and its not...
  2. scmurphy

    DIP sewerline coating

    We have a 3.9 mile section of 42" DIP with an epoxy liner that goes through a swamp to feed our WWTP. The main was installed in 1993 and was inspected last year. With the exception of a few small bedding issues the pipe was found to be in excellent condition. The manhole rings and covers were...
  3. scmurphy

    sewer forced main problems

    Whoa- that pump configuration is interesting, but I'm inclined to believe the problem is an air locked force main. Just looking at the detention times in the force main and the number of cycles the station has to turn to purge the main, there's going to be substantial biological activity and...
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