How to Install a Submersible Well Pump in 9 Steps

Before jumping into the installation process, take a look at your well to determine the best pump for your needs. Consider the depth of your well, the water pressure required, and the flow rate desired. 

Submersible pumps are ideal for wells deeper than 25 feet, since they offer excellent performance and energy efficiency. If your well is less than 25 feet, you may want to consider a jet pump instead.

Once you choose the best submersible well pump for your well, make sure to review the manufacturer’s instruction manual for guidance specific to the product you purchased. If you don’t follow the manual, you could damage your sump pump or void the warranty. Consider hiring a pro instead.

You’ll need standard tools like wrenches, pliers, and wire cutters for tasks throughout the process. Double-check that you have the correct submersible pump, control box, wiring, and piping that align with the specifications of your particular well system, as well. Make sure your sump pump is the right size for your well depth and water needs.

Before beginning any work, turn off the power in the circuit breaker to the well pump. Next, drain the system by opening a faucet or valve to release any remaining pressure for safety and to prevent water from gushing out during the installation process.

If you are replacing an existing pump, it’s time to remove the old pump from the well. Follow the manufacturer's instructions and use your tools to safely disconnect the pump from the water line and electrical connections. Be careful while handling the old pump because it may be heavy or corroded. If this task sounds daunting, put down the tools and call a well pump pro near you to help.

Read the manufacturer's instructions to identify any specific preparations that you need to do before you install the new pump. 

Before lowering the pump into the well, thoroughly inspect it to ensure all components, including the impeller and motor, are securely attached and in working order. This pre-installation assessment helps reduce the risk of issues once the pump is in place.

When lowering the submersible pump into the well, make sure it’s positioned correctly and oriented according to the manufacturer's instructions. The pump should be placed several feet above the bottom of the well to prevent any stirring of sediment and debris. 

Use a sturdy rope or cable to suspend the pump during this process so it maintains a safe distance from the well casing to avoid any damage.

Once the pump is in the correct position, connect the wiring and water line. Follow the manufacturer's instructions for wiring the pump to the control box and power supply. This step is really important, so if you’re ever unsure that you’re doing it right, step aside and let a professional take over. 

Use waterproof, heat-shrink tubing and crimp connectors to secure the connections. Additionally, connect the water line to the pump using fittings and clamps.

After completing the wiring and water line connections, get ready to test the system. Turn on the power at the circuit breaker and see how the pump is operating. Monitor it for any unusual noises or vibrations. Check for leaks in the water line connections and address them quickly. 

To address any leaks: 

• Turn off the power

• Identify the source of the leak

• Tighten or replace the affected components as needed to stop the leakage

Once you know that the pump is functioning correctly and there are no leaks, complete the installation by securing the control box and closing any access points. 

Afterward, it’s important to regularly monitor the pump's performance and maintain it according to the manufacturer's recommendations. This includes: 

• Periodic inspections

• Cleaning

• Testing pump performance