Update on my well.
We set the Gould 7GS07 3-wire pump 300 feet below the pit-less adapter. A 50 psi CSV125 is about 18" below the pit-less.
The FloTec is working fine for now. No bad smell for now.
Tried to run the well dry the first day. With a hose attached to the boiler drain at the tank, it ran until the pump was only putting out about 20 psi. The switch on the tank is set at 40/60. I was surprised that the pump was still going. I thought the low pressure cut-off would have tripped at closer to 30psi. So, first day, the pump did not shut it's self off. After about 2 and 1/2 hours, I shut down the pump and generator myself.
The next day (about 18 hours later), I fired everything up again. The pressure jumped up to 40 psi pretty quick then slowly built up to 60 and shut the pump off.
I opened the drain valve and let it run again. It holds 40 psi for the longest time then slowly drops as the well is drawn down. It did finally stop producing enough pressure and the low pressure cut-out turned off the pump. I used a bucket to measure flow rate when I first started the pump. It was putting out a bit better than 10gpm. The first day I didn't notice any sediment, but wasn't really looking. On the second day, that first bucket full was pretty dark with sediment.
I didn't expect the floor guys to show up so soon, but a job canceled and they wanted to do it right away if they could. So, on the third day, I ran well hard again.
I filled a 275 gallon tote twice and cleaned their cement pump and gear. At the very end, I had to hold the switch on so they could finish their clean up. I would say that this was 3.5 to 4 hours of constant running. The well made it through. Both time, the water in the tote was looking really good. Didn't take a water sample but looked pretty clear.
Valveman - The 50psi CSV125 is 150 feet from tank. The 150 feet is 1" black poly. There is a checkvalve body, but the guts are out and a pit-less adapter in the line. When I was "dumping" the well, the pressure was rock steady at 40 psi. Is the 10 psi drop expected? Isn't that like 23 feet of head? When I closed the drain valve the pressure didn't jump up to 50psi like I expected. It just slowly increased to the cut-off pressure of 60psi. I am guessing that the CSV is not more than 10 feet below the pressure gauge; I haven't measured it though.
Overall, I am happy with the results. (Ignorance might be bliss too.)
But I am going to buy the Cycle Sensor as insurance for a happy marriage.