asfd
New Member
Hi everybody, I am sorry for the long post but I am a bit confused right now.
I just had a 6" well drilled mainly for irrigation purpose. It is 200' deep and static water level was estimated at 20', dynamic (pumping?) level at 60' and recovery rate at 100 gpm (no real recovery test was done).
The well is drilled about 180' from a greenhouse to be irrigated and a field, located about 400' from the greenhouse, is to be irrigated too.
The water requirements are the following: about 25-30 gpm @ 20 psi for drip irrigation, 18 gpm @ ~40 psi for sprinklers and 10 gpm @ 60 psi for manual watering in the greenhouse.
The salesperson at my plumbing supply house was advising me to go the Grundfos SQE route but it seems most of you guys don't like that system. So I am considering going the CSV way (I am particularly attracted by the 3000 rpm of a standard pump vs the 10000 rpm of the SQE). I am thinking of installing the submersible pump at about 80' down, connected with polypipe to an in-well CSV, to a pitless adapter (5' deep), to the greenhouse via polypipe. In the greenhouse I would have a small heated pump room housing a ~20 gallon pressure tank and the pressure switch. Does this seems acceptable?
I am also wondering how I should choose the pump/CSV setting to go with my needs. What kind of pressure drop should I expect from the different parts in the system (the pipe from greenhouse to field would be 2"-3" diameter)? How does the CSV work when the demand is such that pump's available head is lower than the CSV cutoff? Is the CSV wide open then?
For example, I am thinking of using a pump like Franklin Series V 25 gpm with a CSV set at 60 psi. When demand is low, if only part of the drip irrigation is working at 6 gpm for example, the CSV prevents the pump from cycling by keeping it at 60 psi. When Full flow is needed, the pump is able to provide 27 gpm at 30 psi from a 60' pumping depth. What happens then?
I know I need pump wire with insulated ground in the well but I would like to know if it is acceptable to use straight UF wire up to the well and switch to pump wire in a junction box.
Finally, I would like to know what are the options to be able to use 1.5"-2" poly pipe between well and greenhouse. Is it acceptable to use an adapter buried on the outside side of the pitless adapter to step up from 1.25" to 2" pipe.
Thank you all for your time!
I just had a 6" well drilled mainly for irrigation purpose. It is 200' deep and static water level was estimated at 20', dynamic (pumping?) level at 60' and recovery rate at 100 gpm (no real recovery test was done).
The well is drilled about 180' from a greenhouse to be irrigated and a field, located about 400' from the greenhouse, is to be irrigated too.
The water requirements are the following: about 25-30 gpm @ 20 psi for drip irrigation, 18 gpm @ ~40 psi for sprinklers and 10 gpm @ 60 psi for manual watering in the greenhouse.
The salesperson at my plumbing supply house was advising me to go the Grundfos SQE route but it seems most of you guys don't like that system. So I am considering going the CSV way (I am particularly attracted by the 3000 rpm of a standard pump vs the 10000 rpm of the SQE). I am thinking of installing the submersible pump at about 80' down, connected with polypipe to an in-well CSV, to a pitless adapter (5' deep), to the greenhouse via polypipe. In the greenhouse I would have a small heated pump room housing a ~20 gallon pressure tank and the pressure switch. Does this seems acceptable?
I am also wondering how I should choose the pump/CSV setting to go with my needs. What kind of pressure drop should I expect from the different parts in the system (the pipe from greenhouse to field would be 2"-3" diameter)? How does the CSV work when the demand is such that pump's available head is lower than the CSV cutoff? Is the CSV wide open then?
For example, I am thinking of using a pump like Franklin Series V 25 gpm with a CSV set at 60 psi. When demand is low, if only part of the drip irrigation is working at 6 gpm for example, the CSV prevents the pump from cycling by keeping it at 60 psi. When Full flow is needed, the pump is able to provide 27 gpm at 30 psi from a 60' pumping depth. What happens then?
I know I need pump wire with insulated ground in the well but I would like to know if it is acceptable to use straight UF wire up to the well and switch to pump wire in a junction box.
Finally, I would like to know what are the options to be able to use 1.5"-2" poly pipe between well and greenhouse. Is it acceptable to use an adapter buried on the outside side of the pitless adapter to step up from 1.25" to 2" pipe.
Thank you all for your time!