How to Build a Water Jet Pump

Really take advantage of the water you can get out of your well by learning how to build a water jet pump. With this type of pump, you’ll be able to quickly and effortlessly suction out tons of water. Although jet pumps are often susceptible to the elements such as rain or snow, they’re also relatively easy to repair so it’s definitely worth your time to build one for your well. 

Tools and Materials Needed:

  • Water jet pump
  • Lift
  • Ejector
  • Foot valve
  • Vacuum pipe
  • Horizontal valve (if necessary)
  • Well seal
  • Tee
  • Plug
  • Pressure pipe
  • Support legs (if necessary)
  • Jam nut
  • PVC pipe
  • Water tank 

Step 1 – Set Up the Well 

Start by thoroughly cleaning the well and the surrounding area. The lift should reach no deeper than 25 feet. The ejector should have an opening that measures 1 1/4 inches by 1 inch. 

Step 2 – Install the Valves 

Take a foot valve that measures 1 1/4 inches by 1 inch and attach it securely to the bottom of the vacuum pipe. You’ll need to install a 1 1/4-inch horizontal valve if your well is classified as a driven well. 

Step 3 – Secure the Seal 

Cover the top of the vacuum pipe with a seal that measures 1 1/4 inches. For support, also use a tee (otherwise known as a support rest) and a plug that matches the measurement of the seal. Now, connect the pressure pipe to the well seal. The pressure pipe should measure 1 inch. 

Step 4 – Extend the Pipes 

Use more piping to extend the pipes from the two taps in the pump housing: the 1 1/4-inch tap and the 1-inch tap. The pipe extensions need to be united as they go from the water jet pump to your well. For vertical pumps, more support is needed for the pipes so be sure to build in support legs. 

Step 5 – Check the Wiring 

Before using water to test your pump, make sure that all the wiring is correct. Start by verifying that the pump is completely turned off. There should be a sticker on the pump housing that indicates the voltage requirements of the jet pump. Make sure that your pump is receiving the appropriate amount of voltage. Also check that all the wiring is securely hooked up, including the wires that run from the jet pump to the pressure switch. 

Step 6 – Test Your Jet Pump 

Dispense water onto the discharge that should visible on the pump, and then increase the pressure. The pump should start working at this point. The cycle works as follows: as the pressure increases, you can release the regulator so that water is dispensed, which decreases the pressure as a result. Read the gauge and use a jam nut to set the regulator to 5 pounds above the pressure set point. Make sure the nut is secure. Finally, make the water accessible to you and allow it to go where you want it to by attaching the pump to a water tank using PVC pipe.