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.
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.
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...
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...
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...
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...
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...
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...
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...
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?
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...
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...
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
