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Recent content by TurtleboyTom

  1. TurtleboyTom

    Form Deck Corrosion Fix

    Just the metal deck, they said the concrete is in good condition. "The floor deck has severe corrosion and metal loss, with some deck missing or hanging from the steel framing. XXX recommends cleaning the floor deck, replace, in kind, the deck that is badly corroded and hanging from the steel...
  2. TurtleboyTom

    Form Deck Corrosion Fix

    Sorry, I have a drawing showing: main reinforcing #5@12 temp reinforcing #4@12 another drawing I have just shows the reinforcement on the bottom.
  3. TurtleboyTom

    Form Deck Corrosion Fix

    I have a metal deck form that has fallen apart. An engineering firm was consulted to address the building and originally their recommendation was to replace the deck. We had asked if there was any harm in removing it. They said if it considered form deck, there's no issue with removing it to...
  4. TurtleboyTom

    Lift Station Bypass

    I'm looking for ideas on how to bypass the main lift station that located is right before the inlet of our wastewater treatment plant (see picture). It's a small plant - about 21,000 gpd. There are three inlets on the lift station. I can plug two of the inlets and take the buildings out of...
  5. TurtleboyTom

    Shredder Pump Sizing

    Haha. It is a very small flow. If I could size the pumps at 25 gpm I would. Head is 16 feet.
  6. TurtleboyTom

    Shredder Pump Sizing

    https://www.bjmpumps.com/product/sk08cf-460t-4/ Here's the pump I'm looking at, simply because it's the lowest flow I can find. The run time on our 200 gpm pump is often less than 1 hour a day.
  7. TurtleboyTom

    Shredder Pump Sizing

    I am looking to change the pump and piping for the wet well lift station that feeds a small packaged extended aeration activated sludge wastewater treatment plant. The current pump is a submersible solids handling pump and it is oversized, which is causing intermittent, infrequent and high...
  8. TurtleboyTom

    RO Pilot Necessity

    Thanks for the thoughtful response. I'm glad to hear it. We are considering a 900 gpm RO unit and I've been telling management that we need a pilot study before we commit to it. The other day we had an RO expert come on site and tell everyone that it isn't necessary and that it's rare for anyone...
  9. TurtleboyTom

    RO Pilot Necessity

    Is it common practice to run a pilot study when considering Membrane Filtration?
  10. TurtleboyTom

    Help reading pump curve

    Suction pressure is about 15. There is a dp gauge across the pump and it's usually around 98 psi. I also did some more research this morning and found that the impeller was trimmed to 8".
  11. TurtleboyTom

    Help reading pump curve

    The pressure is too high and I'm not sure if the impeller ever was trimmed. I'm just wondering if the impeller were trimmed to 8", based on the curve, shouldn't the head be closer to what specs call for?
  12. TurtleboyTom

    Help reading pump curve

    Motor is 50hp. Pressure gauge on discharge is reading 116psi. CAD drawing says the pump is 465 gallons @ 245 ft TDH. Does this mean the impeller should be trimmed to ~8 inches? Thanks.
  13. TurtleboyTom

    VFD High Service Water Pumps

    thanks, everyone.
  14. TurtleboyTom

    VFD High Service Water Pumps

    Thanks for the advice! Another thought I had was to have the impeller trimmed and install a soft start. Cost is not really a big deciding factor as all options are being considered, even redoing the entire distribution system piping, but I'd like to do the smart and right thing.
  15. TurtleboyTom

    VFD High Service Water Pumps

    I'm considering upgrading our pumps to VFDs. Current pumps are rated 465 gpm @ 245 ft of TDH. Supplied from a 40 ft tank. The distribution system is poorly designed (not a closed loop), HDPE that has frequent leaks usually at the pipe seems. Pressure is pretty high throughout the system (~90...
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