How to Install a Well Water Jet Pump

Water pumps enable you to readily extricate high volumes of water.

They're also easy to repair and inexpensive. If your well is 25 feet or less, you need a shallow water jet pump; if your well is 25 feet or deeper, then you need a deep water jet pump.

Clean any sand or grit from the well and be sure your lift doesn't pass 25 feet. If you're installing a convertible jet pump, make sure the tapped holes in the ejector measure 1 1/4 inches and 1 inch and fit the tapped holes in the well.

Connect the 1 1/4" foot valve to the bottom suction pipe. If you're working with a driven well, mount a 1 1/4" horizontal line check valve.

Fasten a sanitary well seal on top of the 1 1/4" suction pipe. Install the 1 1/4" tee, also known as a support rest or an elbow, and a 1 1/4" plug to support the suction pipe. Secure a 1 1/4" union between the well and the 1" pressure pipe to set as a foundation for the pipes and ejector.

Install 1 1/4" tee on top of the suction pipe, and make sure the tee is slightly higher than the pressure pipe, so it can connect to the pump housing. Then attach a compression coupling on the suction and pressure pipes to spread them apart from each other.

Attach a 1 1/4" pipe into the 1 1/4" tap in the pump housing, connect 1" pipe to the 1" tap in the pump housing and then assemble the two installations together with two unions between the pump and the well. If you're using a vertical pump, then you may want to install some type of support legs from the brackets of the pump housing to hold the weight of the pipes and ejector.

Take a cautionary measure to make sure pump is off, check motor decal to see if it is properly wired and make wire connections in the pressure switch. Then pour water into the discharge of the pump to get it going. Maximize pressure on the regulator and start the pump.

Release regulator slowly when pressure build shows up on the gauge, resulting in discharging of water and decrease in pressure. Establish your operating pressure set point by reading the gauge, modifying the regulator back up to about 5 lbs above set point and then attach a jam nut to secure this adjustment. Connect the discharge of the pump to the water tank using a galvanized or pvc pipe.


  • For deep jet pumps you need to: Attach foot valve to bottom of jet using a galvanized nipple or 1 1/4" galvanized pipe, secure 1 1/4" galvanized pipe to 1 1/4" tap in ejector or jet body and attach 1" pipe to 1" tap in the ejector or jet body. Add the correct number of pipes to reach the depth you want, and fill each pipe with water after lowered into the well.


  • Jet pumps have a greater risk of leaking, overheating and freezing.