Farmer_John
New Member
I recently pulled a non-functional 5HP submersible from my irrigation well.
According to well records from the 60s when it was drilled, it is 80 ft deep with about 30 ft of steel casing.
(I pulled up 74 ft of pipe, so that fits with the records.)
The static water level is 8-10 ft down from the top of the casing, which is 2 ft above the ground.
Also according to the records, they were expecting 100 GPM from the well. This is consistent with more recent wells in the area that show 50 GPM @ 30 ft & 100 GPM @ 100 ft. (draw downs were 10 and 3 ft, respectively.)
Using the well for irrigation.
I understand that for a 5HP pump, ill need to use 2" pipe. im planning on going back down 70 ft plus the pump (20,20,20,10.) I also understand that start-up torque can be a concern.
Questions:
1) Am I correct that I'll need a 5HP pump to obtain 50 GPM @ 40/60 PSI
2) Am I limited to 2" galvanized pipe or will sch 80 PVC drop pipe work?
3) Can I even use a torque arrestor given that the casing doesn't go all the way to the bottom?
4) If I have to use galvanized pipe at the pump - can I switch to PVC 10 ft away from the pump assuming that there is less torque the further you are from the motor.
Thanks,
John
According to well records from the 60s when it was drilled, it is 80 ft deep with about 30 ft of steel casing.
(I pulled up 74 ft of pipe, so that fits with the records.)
The static water level is 8-10 ft down from the top of the casing, which is 2 ft above the ground.
Also according to the records, they were expecting 100 GPM from the well. This is consistent with more recent wells in the area that show 50 GPM @ 30 ft & 100 GPM @ 100 ft. (draw downs were 10 and 3 ft, respectively.)
Using the well for irrigation.
I understand that for a 5HP pump, ill need to use 2" pipe. im planning on going back down 70 ft plus the pump (20,20,20,10.) I also understand that start-up torque can be a concern.
Questions:
1) Am I correct that I'll need a 5HP pump to obtain 50 GPM @ 40/60 PSI
2) Am I limited to 2" galvanized pipe or will sch 80 PVC drop pipe work?
3) Can I even use a torque arrestor given that the casing doesn't go all the way to the bottom?
4) If I have to use galvanized pipe at the pump - can I switch to PVC 10 ft away from the pump assuming that there is less torque the further you are from the motor.
Thanks,
John