Installing a submersible well pump is a reliable way to restore or upgrade your household water supply, but it must be done carefully. This step-by-step guide covers the essentials for installing a submersible well pump, safety checks, and testing so your system runs efficiently and safely.

Before you begin

Turn off power to the well circuit and confirm local plumbing/well codes and permits. Electrical work and wellhead connections can be hazardous; if you’re unsure, hire a licensed electrician or a certified well contractor. Following manufacturer and local guidelines prevents injury, equipment damage, and contamination. 

Tools & parts you’ll need

Typical parts and tools: new submersible pump sized to your well, appropriately rated submersible cable, drop pipe (PVC or steel), pitless adapter or wellhead fittings, cable clamps/pipe wrap, check valve, pressure tank and switch (if applicable), pipe wrenches, torque wrench, Teflon tape, wire stripper, and safety gear (gloves, eye protection).

Step-by-step installation

  • Measure depth & choose pump location: Confirm the pump length fits the well and leave the motor submerged with adequate flow; most manufacturers advise keeping the pump several feet off the bottom to avoid sand and ensure cooling.
  • Assemble the pump to drop the pipe: Attach the pump to the drop pipe per the pump manual. Fasten the submersible cable to the pipe with clamps and use pipe wrap to tie the cable and a safety rope to the pipe so nothing dangles or rubs. Properly torque threaded joints.
  • Lower the pump into the well: Slowly lower the pump, guiding the cable and pipe to avoid snags. If your well uses a pitless adapter, seat the adapter correctly so you can lift the pump without breaking the surface seal. Follow the pitless adapter manufacturer’s procedure.
  • Connect the discharge and check valve: Hook the well’s discharge line to the pressure tank line using a union or proper coupling. Install a check valve to prevent backflow and waterlogging of the pump. Ensure all fittings meet local code.
  • Make electrical connections: Bring the submersible cable into the control box or junction per the wiring diagram in the pump manual. Use waterproof connectors and ground correctly. Electrical connections should be made or inspected by a licensed electrician whenever you’re not fully confident.

Final checks & testing

Pressure test: This involves testing the system, observing the cycles of start and stop of the pump. Ensure no leaks at unions and fittings, ensure that the pressure switch cut-in/cut-out settings are correct, and ensure that unusual noises that indicate rubbing or misalignment are audible. Disinfect the well and test water quality (bacteria, nitrates, etc.) after installation to be sure that the supply was not contaminated during installation. Routine water testing and adequate wellhead sealing ensure your system over the long term. Shaw Pump and Supply ensures all these procedures are followed with precision to maintain the integrity and efficiency of your water system.

Quick tips & safety reminders

  • It is always important to adhere to the manual of the pump manufacturer with regard to torque, wire routing, and minimum submergence.
  • Fix the cable and rope to avoid the snagging.
  • In case the wellhead or control box is flooded, a professional must inspect the electrical parts before turning the power on.