CSV – appropriate for shallow well jet pump?

[PhilSav]

My 20-gal (20 yr old) tank piping needs replacing. Running 40/60 on a
Goulds J10s 1hp, 15’ well, 160 psi 1” poly pipe 100’ from well.
Read about the CSV but have seen many posts here concerning back pressure.
Would the CSV be ok?

 

[RetiredInGueydan]

My 20-gal (20 yr old) tank piping needs replacing. Running 40/60 on a
Goulds J10s 1hp, 15’ well, 160 psi 1” poly pipe 100’ from well.
Read about the CSV but have seen many posts here concerning back pressure.
Would the CSV be ok?

The only increase in back pressure will occur between the pump and the CSV location. I have a CSV on a Goulds SJ10 with a 50/70 switch that builds way more pressure than a J10s and have no issues.

 

[Sponsor]

 

[PhilSav]

Sorry listed wrong pump. I have a Goulds J10S

Goulds J10S, Shallow Well Jet Pump, JS+ Series, 1 HP, 115/230 Volts, 1 Phase, 1-1/4" NPT Suction, 1" NPT Discharge, 24.8 GPM at 5 ft (30 psi), Cast Iron Body​

 

[RetiredInGueydan]

Sorry listed wrong pump. I have a Goulds J10S

Goulds J10S, Shallow Well Jet Pump, JS+ Series, 1 HP, 115/230 Volts, 1 Phase, 1-1/4" NPT Suction, 1" NPT Discharge, 24.8 GPM at 5 ft (30 psi), Cast Iron Body​

Unless you are using a garden hose between the J10S and the CSV, a CSV would be ok.

 

[PhilSav]

No hose between. 2 story house with just 2 persons now.
Wanted the CSV to be at 50 or 55psi using the 5 gal tank.
You don't see any issues with back pressure?

 

[RetiredInGueydan]

No hose between. 2 story house with just 2 persons now.
Wanted the CSV to be at 50 or 55psi using the 5 gal tank.
You don't see any issues with back pressure?

As long as the piping between the pump and CSV can withstand the maximum pressure of the J10S, I see no back pressure issues.

 

[PhilSav]

If we look at the chart I attached. The Max shut off pressure is 74 psi. But doesn't the CSV increase the
back pressure when it's holding the flow at a constant?

 

[RetiredInGueydan]

Yes, it does increase the back pressure which is the maximum pressure that pump can deliver. If you are so concerned about this, just thread a stainless steel nipple into the pump discharge and attach the CSV onto that.

 

[GReynolds929]

The CSV will not create pressure, there will not be more back pressure than the max pressure of the pump. In this case as long as your pipe is rated for 75 psi or more there is no problem. With the CSV at 50 psi there is approximately 24psi of back pressure with 5' of head.

 

[PhilSav]

Thank you

 

[Valveman]

Thanks guys. A pump cannot build more pressure than it can withstand. Pumps are made to produce back pressure. That is what they do. Back pressure is good for a pump and will not hurt it. Too little back pressure is more damaging to pumps. There is the rare occasion of using a pump made for like a 600' deep well and installing it in a well where the water is only 50' deep, which is what cause high back pressure. Even in those cases the back pressure from a CSV will not hurt the pump. The CSV itself and the pipe are the only concerns with too much back pressure. BUT, it can happen. So, pump guys will use that excuse in every conversation about a CSV to talk people out of using it in favor of something much more expensive and shorter lived. As was said a J10S can only build 74 PSI max, which almost isn't enough pressure to work with a CSV. But it will be fine when used with a pressure switch set no higher than 45/65.

 

[Valveman]

Thanks guys. A pump cannot build more pressure than it can withstand. Pumps are made to produce back pressure.

 

[PhilSav]

Thanks guys. A pump cannot build more pressure than it can withstand. Pumps are made to produce back pressure. That is what they do. Back pressure is good for a pump and will not hurt it. Too little back pressure is more damaging to pumps. There is the rare occasion of using a pump made for like a 600' deep well and installing it in a well where the water is only 50' deep, which is what cause high back pressure. Even in those cases the back pressure from a CSV will not hurt the pump. The CSV itself and the pipe are the only concerns with too much back pressure. BUT, it can happen. So, pump guys will use that excuse in every conversation about a CSV to talk people out of using it in favor of something much more expensive and shorter lived. As was said a J10S can only build 74 PSI max, which almost isn't enough pressure to work with a CSV. But it will be fine when used with a pressure switch set no higher than 45/65.

Ready to purchase the PK1A Pside-Kick Pressure Tank Kit components.
Now I’m a bit worried, as you mentioned the pressure needed to run the CSV.
My shallow well depth is 15-20 ft.
(Pump flow chart attached)
“As was said a J10S can only build 74 PSI max, which almost isn't enough pressure to work with a CSV. But it will be fine when used with a pressure switch set no higher than 45/65.”

Is there a minimum flow/pressure to utilize the PK1A? Will this definitely work with my 1hp pump?

 

[RetiredInGueydan]

Ready to purchase the PK1A Pside-Kick Pressure Tank Kit components.
Now I’m a bit worried, as you mentioned the pressure needed to run the CSV.
My shallow well depth is 15-20 ft.
(Pump flow chart attached)
“As was said a J10S can only build 74 PSI max, which almost isn't enough pressure to work with a CSV. But it will be fine when used with a pressure switch set no higher than 45/65.”

Is there a minimum flow/pressure to utilize the PK1A? Will this definitely work with my 1hp pump?

At first you were worried about high back pressure, now minimum flow/pressure. Do yourself a favor and upgrade to a Goulds J15S with that PK1A, and enjoy the water pressure you have been lacking on the 2nd story

 

[Reach4]

Is there a minimum flow/pressure to utilize the PK1A? Will this definitely work with my 1hp pump?

It is important that the pump can produce 1 gpm or more at 60 PSI if using a 40/60 switch.

 

[Valveman]

Ready to purchase the PK1A Pside-Kick Pressure Tank Kit components.
Now I’m a bit worried, as you mentioned the pressure needed to run the CSV.
My shallow well depth is 15-20 ft.
(Pump flow chart attached)
“As was said a J10S can only build 74 PSI max, which almost isn't enough pressure to work with a CSV. But it will be fine when used with a pressure switch set no higher than 45/65.”

Is there a minimum flow/pressure to utilize the PK1A? Will this definitely work with my 1hp pump?

It is not just because of the CSV, but jet pumps need to be able to build a max pressure 10 PSI higher than the shut off setting of the pressure switch.

 

[Valveman]

It is important that the pump can produce 1 gpm or more at 60 PSI if using a 40/60 switch.

Most pumps only need about 2/10s of a GPM flowing to stay cool. We make the CSV for a minimum of 1 GPM to be more than safe for the pump. The CSV just cannot close completely and always allows enough flow to cool the pump. But you are right that it is a lack of flow, not too much back pressure that is bad for the pump.

 

[PhilSav]

I presently run the pump at 40/60. 2 bathrooms on the second floor and the pressure is excellent.
We get close to 2gpm out of the sink faucets. Just wanted the CSV for the steady 50psi when taking long showers or
watering lawn.

 

[Valveman]

I presently run the pump at 40/60. 2 bathrooms on the second floor and the pressure is excellent.
We get close to 2gpm out of the sink faucets. Just wanted the CSV for the steady 50psi when taking long showers or
watering lawn.

Many people think I turned the pressure up when adding a Cycle Stop Valve. With a 40/60 switch you are getting an average of 50 PSI. With a CSV you get a strong constant 50 PSI, which seems much stronger even though the pressure switch is still at 40/60.