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  1. kc27315

    Water Pump Meeting both NFPA20 and NSF61

    Thank you so much for the heads-up!
  2. kc27315

    Water Pump Meeting both NFPA20 and NSF61

    It's not used as a domestic water supply pump, but is connected to the single main that supplies domestic and fire suppression needs. So if it is NFPA 20 rated, then it could contaminate the drinking water if it were ever used.
  3. kc27315

    Water Pump Meeting both NFPA20 and NSF61

    If the pump isnt acceptable, then, of course it's not possible to get a policy. It would sure be convenient if some einstein-level manufactuter came up with a magical pump that would be both acceptable to an insurance company AND meet drinking water standards.
  4. kc27315

    Water Pump Meeting both NFPA20 and NSF61

    I can't argue with that.
  5. kc27315

    Water Pump Meeting both NFPA20 and NSF61

    What's interesting in my case is that everyone (City, Fire Marshall, etc) signed off the plans which included a drinking water rated NSF 61 pump to serve domestic, hydrants, and risers/sprinklers in parallel with a few smaller pumps to serve everyday use. Turns out that the only "someone" who...
  6. kc27315

    Water Pump Meeting both NFPA20 and NSF61

    LittleInch, Thank you for your input. All the manufacturer's I've spoken with have said the same thing as you and this is what I am afraid of. It just seems that someone could become a millionaire pretty quick if they found a way to make such a pump feasible/possible. My particular project has...
  7. kc27315

    Water Pump Meeting both NFPA20 and NSF61

    Thanks so much for your reply. It is regarding an actual project, but I don't have a completed datasheet. I have spoken with several manufacturers, and they've all suggested that there does not exist a pump which meets both NFPA 20 and NSF 61. I think they've suggested something like gaskets...
  8. kc27315

    Water Pump Meeting both NFPA20 and NSF61

    Suppose I'm designing a single service main to serve BOTH fire sprinkler/hydrants AND domestic needs. I would love for the pump gods to have come up with a way to create a single high flow pump that is fire rated (NFPA 20) AND meets drinking water standards (NSF 61). Is anyone aware of a pump...
  9. kc27315

    Using Curve Number Method to determine required Detention Storage Volume

    I'm trying to use the Curve Number (CN) Method calculate the required Detention Storage Volume for a pond near the outlet of a 26-ac watershed. I've used NOAA Atlas 14 to find the total rainfall depth (1.83 inches). I'm required to use the Farmer Fletcher 100-year 3-hour Unit Hydrograph for...
  10. kc27315

    Water modeling of multi-building development

    All, I'm a Civil Engineer and I've been tasked with creating a water model in EPANET for a proposed development that will have 7 different buildings to serve with culinary and fire flows. The seven buildings will be served by a looped waterline coming off a single connection to an existing...
  11. kc27315

    EPANET Total Head of Junction

    cvg, that's correct. PSI = Feet of Head divided by 2.31, however, in my case, I'm converting in the other direction. 77.88 PSI, when converted, is 179.9 feet of head. This makes my equation: 4552 ft + 179.9 ft = 4731.9 ft Units can definitely be a bugger sometimes though. I mix them up...
  12. kc27315

    EPANET Total Head of Junction

    Gocha, thanks for the reply coloeng! I guess looking at, say, a V = 10 ft/s would yield a velocity head of only (10^2)/(2*32.2) ≈ 1.55 ft => 3.59 psi, which isn't a ton of pressure I suppose... And perhaps by not including it, we would have conservative results. Thoughts anyone?
  13. kc27315

    EPANET Total Head of Junction

    Considering Bernoulli's Equation, the Total Head should be the sum of the Elevation/Velocity/Pressure Heads at each point. My EPANET question is this: Is Velocity Head included in the computation of "Total Head" at a given Node? If so, which velocity is used? One of the upstream velocities? A...
  14. kc27315

    PS text not showing up over viewport when a raster image is in model space.

    thread555-88205 I have had the most difficult time getting some PS text in a particular dwg to show up over a viewport that has a raster image. Tried multiple workarounds with no luck. Finally, a coworker suggested I do an audit on the dwg, then save, close, and re-open. For some reason it did...
  15. kc27315

    EPANET General Purpuse Valve - Flow Rate vs. Headloss Curve

    Valve (GPV). I just don't see where to enter the name of a curve like I do with Pumps...http://files.engineering.com/getfile.aspx?folder=90b50d67-5a5f-49db-b10c-5bdd6f3a0723&file=GPV.JPG
  16. kc27315

    EPANET General Purpuse Valve - Flow Rate vs. Headloss Curve

    Here is a screenshot of what I see when I open the properties on a valve and pump.http://files.engineering.com/getfile.aspx?folder=61487298-763e-4df6-b6ad-6e41342b0b7d&file=Pump.JPG
  17. kc27315

    EPANET General Purpuse Valve - Flow Rate vs. Headloss Curve

    Hello, I'm running an EPANET model for a commercial metered system. I'm required to install a water meter near the single connection point to the system. The meter that was chosen will produce headloss that varies with flow rate through the meter. I've created a "Curve" in EPANET to represent...
  18. kc27315

    Estimating % Sediment Removal for 50' Buffer Requirements

    I'm not anticipating that anyone will review this plan in the near future. I'm just worried that the County or the EPA will show up on-site and want to see which "model or other type of calculator" I used to come up with the % sediment removal efficiency number that I came up with. I am required...
  19. kc27315

    Estimating % Sediment Removal for 50' Buffer Requirements

    When I was first looking at this problem, I was hoping to find some literature somewhere that shows a % Sediment Removal Rate for different BMPs such as a silt fence. However, I spoke with someone more familiar with the requirements to comply with the 50' buffer section of the General Permit...
  20. kc27315

    Estimating % Sediment Removal for 50' Buffer Requirements

    Thank you for your reply. The only guidance I can find is in Appendix D of the Utah Construction General Permit UTRC00000. Step 2 on Page D-11 suggests the use of a model such as RUSLE for determining the Percent Sediment Removal Efficiency of storm water controls.

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