My new build that was discussed here last summer got delayed until now. So I'm back for some final recommendations regarding a specific pump.
Shallow well cistern (measured 32.5" ID) with approx. 5' (250 US gal.) reserve water in the cistern.
TDH=190-200' (60 psi system+ 20' static head to pressure switch + pipe/fitting/etc. losses).
Design peak demand = 10 US gpm
Design pressure = 60 psi (50/70 pressure switch)
Pressure tank = 10 US gal.
Cycle stop valve = PK1A
After all of the helpful information last year, I'm convinced I should go with a Grundfos SP pump (230v, 2-wire) with cycle stop valve. When I go to the Grundfos website and look at the charts (and also using their online tool), they recommend a couple of different options - either the Grundfos "16S07-8" (16 US gpm, 3/4 hp, 8 stage) or the Grundfos "10S07-12" (10 US gpm, 3/4 hp, 12 stage).
I realize I only need 10 US gpm, but the 16 US gpm "16S07-8" is physically shorter and would be easier to set the pump in the well horizontally, and therefore use more of my reserve water. The total length of the "16S07-8" motor+pump is 24.2", whereas the "10S07-12" length is 27.5", which I think would be tight with fittings to set horizontally inside the 32" ID cistern.
Is there any downside to going with the "16S07-8" pump vs. the "10S07-12"?
Also, when I look at ordering for example the "16S07-8" Grundfos has 2 different order codes. One version includes a "CSIR" type motor, the other version includes a "RSIR" type motor. Any advice on these options?
Shallow well cistern (measured 32.5" ID) with approx. 5' (250 US gal.) reserve water in the cistern.
TDH=190-200' (60 psi system+ 20' static head to pressure switch + pipe/fitting/etc. losses).
Design peak demand = 10 US gpm
Design pressure = 60 psi (50/70 pressure switch)
Pressure tank = 10 US gal.
Cycle stop valve = PK1A
After all of the helpful information last year, I'm convinced I should go with a Grundfos SP pump (230v, 2-wire) with cycle stop valve. When I go to the Grundfos website and look at the charts (and also using their online tool), they recommend a couple of different options - either the Grundfos "16S07-8" (16 US gpm, 3/4 hp, 8 stage) or the Grundfos "10S07-12" (10 US gpm, 3/4 hp, 12 stage).
I realize I only need 10 US gpm, but the 16 US gpm "16S07-8" is physically shorter and would be easier to set the pump in the well horizontally, and therefore use more of my reserve water. The total length of the "16S07-8" motor+pump is 24.2", whereas the "10S07-12" length is 27.5", which I think would be tight with fittings to set horizontally inside the 32" ID cistern.
Is there any downside to going with the "16S07-8" pump vs. the "10S07-12"?
Also, when I look at ordering for example the "16S07-8" Grundfos has 2 different order codes. One version includes a "CSIR" type motor, the other version includes a "RSIR" type motor. Any advice on these options?