Quick Answer
A pressure tank is not strictly necessary with a jet pump, but it can be beneficial in certain situations, such as in areas with inconsistent water demand or to stabilize the pump operation.
When a Pressure Tank is Required
A pressure tank is typically needed when using a jet pump to supply a household with a high water demand, such as in a large home or a home with multiple bathrooms. In these situations, the pressure tank helps to stabilize the pump operation by allowing it to cycle on and off less frequently, reducing wear and tear on the pump. A general rule of thumb is to install a pressure tank if the home requires more than 10 gallons per minute (GPM) of water.
Sizing the Pressure Tank
The pressure tank should be sized based on the water demand of the home and the flow rate of the jet pump. A good starting point is to install a tank with a minimum capacity of 20 gallons and a maximum pressure of 80-100 pounds per square inch (PSI). For example, if the home requires 15 GPM of water and the jet pump has a flow rate of 12 GPM, a 20-gallon pressure tank with an 80-100 PSI rating would be suitable.
Installation Considerations
When installing a pressure tank with a jet pump, it’s essential to ensure that the tank is properly sized and installed to avoid any issues with the pump operation or water pressure. The tank should be installed after the check valve and before the pressure switch, and it should be filled with air to the recommended pressure. By following these guidelines, you can ensure a reliable and efficient water supply system for your home.
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