Help with Booster pump

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Boreal

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Forgive me if this problem has been covered before. ...homeowner on city water which supplies 20 GPM @ 40PSI. I would like to boost the pressure to 70 PSI but at times I calculate my water usage can rise to 25 GPM for short periods of time. I have had Amtrol style diaphragm tanks before but they became starved of water during high usage periods and the pumps would overheat and not maintain pressure. Some have suggested pairing a booster pump with a large water storage tank and this is where I get confused--large tanks are not pressurized so wouldn't that create problems for the booster pump and pressurized tanks have a small draw down (30 gallons) so that doesn't give me much water during high usage times. What is the best solution?
 

Valveman

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25 GPM is a lot of water for house use. Most houses use about 5 GPM at the most. But you can have as much water and pressure as you want. If the city line cannot supply more than 20 GPM, then you need a cistern or storage tank to fill with city water, so it can be used and boosted with a pump to supply as much flow and pressure as you want. To pump 25 GPM at 70 PSI from a cistern you will need a 1.5HP multi-stage pump like the Goulds 25GB15-9. Add a PK1A constant pressure control kit with a 10 gallon pressure tank and a 60/80 heavy duty pressure switch. Or, you can use a submersible well pump in the cistern like a 15
GS15-9.




Multistage Booster and PK1A.jpg

Cistern Storage Tank with Submersible Booster Pump.jpg
 

Reach4

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Forgive me if this problem has been covered before. ...homeowner on city water which supplies 20 GPM @ 40PSI.
What is the water pressure when you are not using water?
 

Boreal

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25 GPM is a lot of water for house use. Most houses use about 5 GPM at the most. But you can have as much water and pressure as you want. If the city line cannot supply more than 20 GPM, then you need a cistern or storage tank to fill with city water, so it can be used and boosted with a pump to supply as much flow and pressure as you want. To pump 25 GPM at 70 PSI from a cistern you will need a 1.5HP multi-stage pump like the Goulds 25GB15-9. Add a PK1A constant pressure control kit with a 10 gallon pressure tank and a 60/80 heavy duty pressure switch. Or, you can use a submersible well pump in the cistern like a 15
GS15-9.




View attachment 100549
View attachment 100550
Thank you for the reply. What would be the reason for the multi stage vs single stage pump recommendation? Estimated head is 80ft.
 
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