Silly shallow pump question ?

[1911smith]

The shallow pump I have has a 1" NPT into the pump head and a 1" out. I would like to use this shallow pump to move water from a 250 gal tank to a 20 gal pressure tank with a 40-60 pressure switch. The pump would be at ground level and set right beside the tank and suppling the pump with hydrostatic water pressure.

Is it possible to use a 1-1/4" line out of the pump head to the pressure tank to have a faster water pressure recovery time over the 1" line out ? If it is possible, I would like to have a shorter pump cycle time to fill the pressure tank and kick the pump off.

 

[Valveman]

Unless it is going a long distance, larger pipe will not help. You will get whatever the pump can supply and no more. Is that pump capable of working with a 40/60 switch? It needs a max pressure of more than 65 to do that.

Short pump cycle times are not good. A pump needs to run for at least one minute, two minutes is better, and running continuously 24/7/365 is best for the pump. Short cycling is what destroys nearly all pumps. Use as large a pressure tank as possible for the longest run time, or it is even better to use a Cycle Stop Valve so the pump runs continuously while water is being used instead of cycling on and off repeatedly. With a CSV a large tank is not needed. But the CSV further benefits the pump even if you have a large tank.

 

[1911smith]

Hello Valveman and thank you for the wealth of information. First question, How would I go about testing the shallow well pump to find out what the max pressure is ?

 

[Valveman]

Hello Valveman and thank you for the wealth of information. First question, How would I go about testing the shallow well pump to find out what the max pressure is ?

Give me the model number.

 

[1911smith]

Give me the model number.

Hello again, Amazon says this is the model no.

Item model number	‎QJNGXpu26iMTTe29Yr1tDA0c2

 

[1911smith]

Give me the model number.

I found the owners manual for the shallow pump and the Model no, is JGP8001C INOX . 845 GPH and working pressure is 1.5-3.0 bar. Hope this helps. Thanks again.

 

[Valveman]

Shows 3 bar max pressure which is 43 PSI. 20/40 pressure switch is the best you can do with that pump.

 

[1911smith]

Give me the model number.

This is the model no. for the Vevor sub. pump 4SSM4/5-2,

VEVOR Deep Well Submersible Pump, 0.5HP 230V/60Hz, 28gpm 167ft Head,​

Thank you, Mike

 

[1911smith]

Shows 3 bar max pressure which is 43 PSI. 20/40 pressure switch is the best you can do with that pump.

Ok I done the conversion for bar to PSI and yes that's what it was. So for curiosity what would happen with a 30-50 switch?

 

[Valveman]

This is the model no. for the Vevor sub. pump 4SSM4/5-2,

VEVOR Deep Well Submersible Pump, 0.5HP 230V/60Hz, 28gpm 167ft Head,​

Thank you, Mike

That should be 28 GPM max at zero pressure and zero flow at 167' max head pressure. 167' is 72 PSI. This pump will pump from a cistern and work with a 40/60 switch. Or, it can pump from the well to the cistern as long as the water level is not deeper than about 150'.

 

[Valveman]

Ok I done the conversion for bar to PSI and yes that's what it was. So for curiosity what would happen with a 30-50 switch?

If you turn the pressure switch up to 30/50 on a pump that can only build 43 PSI, the pump will just sit there at 43 PSI and run until it melts down. Which won't take long.

 

[1911smith]

That should be 28 GPM max at zero pressure and zero flow at 167' max head pressure. 167' is 72 PSI. This pump will pump from a cistern and work with a 40/60 switch. Or, it can pump from the well to the cistern as long as the water level is not deeper than about 150'.

I am picking up what you are laying down! Thank you.

 

[1911smith]

If you turn the pressure switch up to 30/50 on a pump that can only build 43 PSI, the pump will just sit there at 43 PSI and run until it melts down. Which won't take long.

Well against my better judgement I been playing with that new 40-60 switch and trying to adjust a shorter run time, before you and I started chatting about my little water project. To keep from confusing others who might be following this, I will private message you with other info not to confuse the average person needing help. I think and do outside of the box more then most and I and sure you know what I am referencing! LOL Thanks again.