Question about Flotec Corrosion Resistant Shallow Well Jet Pump 1/2HP, 8GPM

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How do I know if my jet pump is going bad? It's at least 16 years old, and it can't handle the flow demand of a shower and a washing machine at the same time. It will drop pressure to the point where it can't recover on it's own and I must prime it to get the pressure up before I open up the valve to pressurize the whole system. The bladder tank is just as old as the pump, it is pressurized at 2 lbs. below the pump start-up pressure which is on at 30 off at 50.

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I had similar problems it ended up being the shallow well it self. It did not have enough gallons per minute of flow to keep enough water flowing to allow pump to function properly. Some well drilling companies can clean out well or vanes to allow well to flow properly. Otherwise you will most likely need to drill a newer deeper well.

Posted on Sep 30, 2010

Testimonial: "Thanks, I'll look into having the well drilled deeper."

  • Andrew Bugbee Jul 17, 2011

    Your tank pressure should be set at 2 lbs below your cut in pressure setting on the pressure switch. That means you should have 28 lbs press. in your tank. The diaphragm in the tank is probably bad. Seeing as your pump is 16 years old then it might be a good idea to change that as well. A 1hp pump is not much more than a 1/2hp pump and can deliver more water at higher pressures so you may want to upgrade. Also consider increasing the size of your tank. The benefit of a larger tank is two fold. If there is a power outage a bigger tank will deliver more water even with no power because of extra storage capacity. Also, you want your pump run time to be at least one minute. Pumps like to run. They don't like to turn on and off so if you have a bigger tank the pump will run longer to fill it. I also suggest you change your press. switch setting to 40/60, or 50/70. The pipes in your house can easily handle this higher press, but don't go over 70 as it may cause your water heater press relief valve to blow off. Remember to increase the press. in your tank to 2 lbs below your cut in press.(the low number on the press switch setting.) Good luck!


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