How to properly size piping for a jet pump installation?

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Sizing Piping for Flow Rate When sizing piping for a jet pump installation, the first step is to calculate the maximum flow rate needed. This can be done by considering the pump’s capacity and the number of users. For example, if the pump has a capacity of 10 gallons per minute (GPM) and there are 5 users, the total flow rate needed is 10 GPM x 5 users = 50 GPM. To ensure the piping can handle this flow rate, select piping that can handle a minimum of 1.5 to 2 times that flow rate, which in this case would be 75 GPM to 100 GPM.
Pressure Testing Piping Once the piping has been sized for flow rate, it’s essential to pressure test the piping to ensure it can handle the pressure and flow requirements. A pressure test can be performed by connecting a pump to the piping and slowly increasing the pressure until the piping reaches its maximum operating pressure. For a jet pump installation, the maximum operating pressure is typically around 80-100 PSI. If the piping can handle this pressure without leaking, it’s suitable for the installation.
Piping Material Selection When selecting piping material for a jet pump installation, schedule 40 PVC piping is a common choice. This type of piping is durable, resistant to corrosion, and can handle high water pressures. It’s also relatively inexpensive and easy to install. When selecting piping, be sure to choose a material that’s compatible with the pump and other components in the system. Additionally, consider factors such as pipe diameter, length, and fittings to ensure the piping can handle the flow rate and pressure requirements of the installation.