JET PUMP INSTALLATION
 

How To Install A Well Water Jet Pump

 

Read your manual for installation, operation, and safety information. This guide neither supplements nor replaces the Owner’s Manual.

How to Install a Well Water Jet Pump
Installation of a jet pump requires a fair level of plumbing skills and may also require a hoist or special tools. The installation procedure for both types of pumps is the same, except for the number of pipes involved. A shallow well jet pump requires one pipe (the suction pipe) to be placed down the well. A deep well jet pump requires two pipes (the suction pipe and a driver pipe) and the jet assembly to be placed down the well.

Cost (0-5 scale): 3
Difficulty (0-5 scale): 3

Items Needed:
• Jet pump and ejector, if for a deep well
• Pressure tank
• Pipe, pipe glue, fittings
• Well seal
• Derrick and winch
• Wrenches, cutter, sealing tape or pipe thread compound, etc.

Step One - Well Preparation
Before installing any pump, clear the well of all grit, sand or dirt, and ensure that the water flows clear. Your well drilling company may have already flushed the well for you.

Step Two - Place the Pipe in the Well
Holding the pipe in place and safely lowering it into the well requires special tools. Use a scaffolding or derrick above the well casing and a winch to lower the pipe.
• Shallow well pump
Attach the foot valve to the first section of pipe. Lower the assembly into the well, foot valve first, until the top of the pipe is at the top of the well casing. Attach the next section of pipe to the initial pipe and lower the assembly into the well until the top of the pipe is again at the top of the well casing. Repeat this process of attaching pipe and lowering the assembly until the proper operating depth is reached.
• Deep well pump
If a tail pipe is required, attach the foot valve to the tail pipe and then attach the tail pipe to the bottom of the jet assembly (ejector). Lower the assembly into the well, foot valve first, until the jet assembly is at the top of the well casing. Attach both the suction pipe and the driver pipe to the jet assembly.
If a tail pipe is not required, attach the foot valve to the bottom of the jet assembly with a close nipple. Attach both the suction pipe and the driver pipe to the jet assembly.
Lower the assembly into the well until the top of the pipe is at the top of the well casing. Repeat this process of attaching pipe and lowering the assembly into the well casing until the proper operating depth is reached. The foot valve will typically be 5 feet (2 m) above the well bottom.

Step Three – Attach pump
Seal the well casing with a well seal. This device supports the weight of the pipe assembly in the well casing. It allows water to be pumped from the well while preventing foreign materials from entering the well casing. Connect the suction pipe (and the deep well drive pipe) to the pump.

Step Four – Connect to power, prime, and test system
Confirm that the pump motor is set for the available power. Connect power and ground lines to pressure switch.
Prime the system (fill the pump housing and pipe(s) with water). Once running, the pump is self-priming. Install the priming plug (and close the deep well pump pressure regulator). NEVER RUN THE PUMP DRY.
Make sure all plumbing connections are tight. Check the air charge in the pressure tank. Turn on power to the pump. For a deep well pump, the pressure regulator will need to be adjusted, as described in the owner’s manual. Water should flow within 5 minutes. Let the system cycle automatically a few times until the water is clear.
If water does not flow, turn off the power, re-prime the system, and repeat the above paragraph.
Turn off the power and connect the pump outlet to the outlet valve and then to the pressure tank. Open the outlet valve and turn on power to the pump. Water should flow. The system is ready for service.

Jet Pump Replacement: 4 Tips
Tip One - Cut the Power
The first thing to remember is to disconnect the jet pump from electrical power before you do anything else.

Tip 2 - Buy Exactly the Same Jet Pump
If possible, replace your jet pump with the exact same model as the old one to ensure compatibility with the rest of your system. To make sure you get exactly what you need, take photographs of the existing pump and tank system, including the old pump nameplate. With help from the sales clerk and the photographs, you can match the replacement pump to the original model, or at least find a comparable model of the same size and with the same pump performance.

Tip 3 - Test the Pump with Water
When you’ve brought the new pump home, use good electricity safety to connect the pump to electric power, observing correct wire positions (as given in the pump owner’s manual). Reconnect the suction pipe (and deep well drive pipe) and the outlet pipe. Make sure you seal all threaded joints with Teflon tape or drinking-water-safe pipe thread compound. Prime the system, turn it on, and let it run a few cycles. If it fails to pump water within 5 minutes, you need to turn off the power and re-prime the system.

Tip 4 - Don’t Be Afraid to Ask for Help
If something goes wrong at any point in the replacement process, or if you realize that the problem with your jet pump is more far reaching than just a problem with the pump itself, don’t be afraid to call in a professional.