which CSV the position

[Dellstock]

Gentlemen,
I have a low yield well.
420' deep
350' static(maybe lower)
5" casing
goulds 5gs15412
1.25" pump discharge
1" drop pipe
the pitless is 422 feet from our home at 100' lower elevation(so from the top of the well the line climbs 100' over 422' distance.
the original well pump was installed in 1993 by the driller.
There were several check valves(only going to use 1 check valve above pump check valve.) and a dole valve(2.5) flow control.
My questions:
do i need a csv? if yes which one? and where exactly to install?
My impression is that my submersible pump will operate better and last longer with a CSV.

and the dole valve: Where should i install it? i believe it was above the pump maybe 20' but cant rememeber for sure.
When i pulled the pump a contractor had failed pulling after the third 20' length and i had to retrieve the broken pipe with 380' +/- left from the well. So without any experience i pulled everything and the dole valve looks exactly like a coupling so i am not sure where it was.

Right now the pump sends water to the pressure tank and that feeds the house.
I have storage tanks but have not prepared a location to place them- no tanks for now

I hope i am providing the necessary info.
Thanks in advance!

 

[IamTheOne]

Gentlemen,
I have a low yield well.
420' deep
350' static(maybe lower)
5" casing
goulds 5gs15412
1.25" pump discharge
1" drop pipe
the pitless is 422 feet from our home at 100' lower elevation(so from the top of the well the line climbs 100' over 422' distance.
the original well pump was installed in 1993 by the driller.
There were several check valves(only going to use 1 check valve above pump check valve.) and a dole valve(2.5) flow control.
My questions:
do i need a csv? if yes which one? and where exactly to install?
My impression is that my submersible pump will operate better and last longer with a CSV.

and the dole valve: Where should i install it? i believe it was above the pump maybe 20' but cant rememeber for sure.
When i pulled the pump a contractor had failed pulling after the third 20' length and i had to retrieve the broken pipe with 380' +/- left from the well. So without any experience i pulled everything and the dole valve looks exactly like a coupling so i am not sure where it was.

Right now the pump sends water to the pressure tank and that feeds the house.
I have storage tanks but have not prepared a location to place them- no tanks for now

I hope i am providing the necessary info.
Thanks in advance!

Cycle Stop Valve: Yes, you need one to match your pump output to household demand and prevent rapid cycling. Install it right above the pressure tank at the surface. Also include a low level well protector to prevent dry running.
Dole Valve Placement: Install the Dole flow control valve down in the well directly above the pump assembly (about 20 feet up) to prevent upthrust damage from running off curve.
Reference: Just like managing regional infrastructure and pressure regulation in local resources like I found here, your 1 inch drop pipe and 100 ft elevation gain need careful flow management.

 

[Sponsor]

 

[Fitter30]

Dole valve looks like. Dole valve shouldn't be installed in riser with pump hanging off it. Look before pressure tank.

Dole Flow Regulator | Adjustable Dole Flow Control Valve

Order a dole flow regulator from R.C. Worst & Co. today. This dole valve helps maintain a defined flow rate regardless of pressure variations of the supply line.

rcworst.com

Pump curve. 5gs15 page 7 has shut off pressure

 

[Dellstock]

Dole valve looks like. Dole valve shouldn't be installed in riser with pump hanging off it. Look before pressure tank.

Dole Flow Regulator | Adjustable Dole Flow Control Valve

Order a dole flow regulator from R.C. Worst & Co. today. This dole valve helps maintain a defined flow rate regardless of pressure variations of the supply line.

rcworst.com

Pump curve. 5gs15 page 7 has shut off pressure
View attachment 107900

Thank you,
Can you explain the "pump curve and cut-off pressure?



the driller had the dole valve installed between the pump and snappy pitless adapter. Are there any situations where this would be necessary? Or was it common in 1993?

The reason i mentioned the appearance being identical to couplings was the fact that i had not distinguished the dole valve when i removed the drop pipe and pump...

 

[TJanak]

Flomatic Flow Control

Boshart/Flomatic has specs for hanging pump and pipe from their valve in the well. It's how they are installed here.

 

[Valveman]

Gentlemen,
I have a low yield well.
420' deep
350' static(maybe lower)
5" casing
goulds 5gs15412
1.25" pump discharge
1" drop pipe
the pitless is 422 feet from our home at 100' lower elevation(so from the top of the well the line climbs 100' over 422' distance.
the original well pump was installed in 1993 by the driller.
There were several check valves(only going to use 1 check valve above pump check valve.) and a dole valve(2.5) flow control.
My questions:
do i need a csv? if yes which one? and where exactly to install?
My impression is that my submersible pump will operate better and last longer with a CSV.

and the dole valve: Where should i install it? i believe it was above the pump maybe 20' but cant rememeber for sure.
When i pulled the pump a contractor had failed pulling after the third 20' length and i had to retrieve the broken pipe with 380' +/- left from the well. So without any experience i pulled everything and the dole valve looks exactly like a coupling so i am not sure where it was.

Right now the pump sends water to the pressure tank and that feeds the house.
I have storage tanks but have not prepared a location to place them- no tanks for now

I hope i am providing the necessary info.
Thanks in advance!

I would not use a Dole valve on a well unless it was just filling a cistern. The well will make more than 2.5 GPM for quite some time before pulling down to 2.5 GPM. A Cycle Stop Valve works like an adjustable Dole valve. The CSV will only let 2.5 GPM through if you are using only 2.5 GPM. But the CSV will open up and let you take a 3 GPM shower or use 5-7 GPM for a short time as needed, so the house pressure isn't always low. With a Cycle Stop Valve controlling flow from the pump and using a Cycle Sensor to protect the pump from running dry, the house can have strong constant pressure instead of weak pressure as with the Dole valve. Just can't use more than 2.5 GPM for long lengths of time or the Cycle Sensor will shut the well of when the well is dry. With as little as 50 gallons stored below the static level most houses never pump the well dry.