# Pump volume and pressure question

Discussion in 'Pumps and Tanks Well Forum & Blog. Water is life.' started by djdixon1995, Jan 17, 2008.

1. ### djdixon1995New Member

Joined:
Jan 12, 2008
I'm getting about 5 GPM (using a bucket and a watch) and mediocre pressure from my well. It's a 1/2 HP pump into a tank with 40 PSI reading on the tank pressure guage. Is there a way to improve the volume and pressure?

I'm guessing volume is a function of the pump so I'd have to get a bigger pump to get more water.

Can the pressure switch or the tank precharge be adjusted in order to increase the pressure from the faucet?

Thanks,
djdixon1995

2. ### RancherGuest

Are you measuring the output of the pump, or the output of the tank? i.e. did you isolate the tank and just capture the water out of the well? What kind of pump, submersible or above ground jet?

What is the range of the PSI on the pressure guage when the pump cycles, 20/40? If so yes you can adjust that switch to turn off at a higher pressure, but depending on your answer for what kind of pump you have, it may not be able to pump that high.

Volume is a function of how many impellers the pump has if it's a submersible pump, and how big the pipe is. Volume at the house is also a function of how high the pressure is at the tank.

Rancher

4. ### pitlessWell Driller, pump installer, engineer

Joined:
Jan 13, 2008
Occupation:
Manufacturer
Location:
Rancher,

Volume is the thickness of the impellers. Pressure is the result of more stages or impellers.

djdixon1995

You need to be more specific. Do you get 5 gpm at 40 psi. Or do you start at 40 psi and then the pressure drops as you draw the water.

Rancher is right in asking how you measured your flow rate. Just sampling from a faucet may show many different types of problems. Such as a valve partly shut off can result in low pressure when the well and system is fine. Also rusted water lines or fittings can cause problems.

Can you pump straight from the well and determine the water level? This would give the capacity of the well and indicate if you have probems in your water system.

5. ### speedbumpNew Member

Joined:
Jul 15, 2005
Occupation:
Water well and pump tech.
Location:
Riverview, Fl.
Assuming you have a jet pump. 6 gallons per minute at 40 psi with a lift of 10 feet is about what can be expected from a 1/2 hp.

bob...

Forum Title Date
Pumps and Tanks Well Forum & Blog. Water is life. Pump Up the Volume (or Pressure...) Nov 13, 2010
Pumps and Tanks Well Forum & Blog. Water is life. Low pressure and volume on shallow well pump Dec 3, 2006
Pumps and Tanks Well Forum & Blog. Water is life. Well Pump Clearance Today at 10:24 AM
Pumps and Tanks Well Forum & Blog. Water is life. Torque-arresters for Sub-Pumps.... Yesterday at 8:27 PM
Pumps and Tanks Well Forum & Blog. Water is life. Saved on the Well Drilling, Getting hammered on pump install,,,Need some input. Sunday at 4:28 PM