What happens when you replace a submersible well pump

Replacing a submersible well pump means pulling the old pump out of the well, disconnecting it from the electrical line and pressure tank, and lowering a new pump down into the well on the same drop pipe. The pump sits at the bottom of the well and pushes water up through that pipe to your house. When it fails, no water reaches your taps—and the pump cannot be repaired in place, so it has to come out.

This is a job that usually requires a licensed well contractor. The pump itself costs $400 to $2,500 depending on the well depth and flow rate, but the labor to pull and install it often runs $1,500 to $3,000 because the contractor needs a truck with a winch, the right tools to disconnect the electrical box, and knowledge of local well codes. You can learn what the process looks like and what to expect, but the actual work should go to someone licensed in your state.

Key Takeaways

  • A submersible pump sits at the bottom of your well and must be pulled out completely to be replaced—it cannot be fixed underground.
  • The pump is connected to three things: the drop pipe carrying water up, the electrical line running down, and the pressure tank at the surface, all of which must be disconnected before removal.
  • Pump replacement costs vary widely based on well depth, pump size, and local labor rates, so get quotes from at least two licensed well contractors before deciding.
  • You will need to know your well depth, the current pump horsepower, and your household water usage to help the contractor choose the right replacement pump.
  • Most states require a licensed well contractor to do this work, and some require a permit before the pump is replaced.

Signs your submersible pump is failing

A submersible pump usually fails suddenly rather than gradually. You may notice the water pressure dropping over a few days, then stopping entirely. Sometimes the pump will cycle on and off rapidly, which means it is running but not building pressure. Other times the breaker trips repeatedly when the pump tries to start, a sign the motor is drawing too much current.

If you have low pressure but water still flows, the problem might be a clogged filter or a leak in the drop pipe rather than pump failure. A licensed contractor can test the pump with a voltmeter and pressure gauge to confirm whether it is the pump itself or something else. Do not assume the pump is dead until someone has checked it—sometimes the fix is simpler.

What the contractor will do to remove the old pump

The contractor arrives with a truck equipped with a winch or hoist. The first step is to turn off power to the pump at the breaker box and lock it so no one can turn it back on while the pump is being worked on. Then the contractor opens the well cap and begins pulling up the drop pipe—the plastic or steel pipe that runs from the pump at the bottom to the pressure tank at the surface. This pipe is often 50 to 400 feet long depending on your well depth, so pulling it takes time and equipment.

As the pipe comes up, the contractor disconnects the electrical line that runs alongside it. Once the pump reaches the surface, the contractor disconnects it from the drop pipe and removes it. The drop pipe stays in the well. The contractor inspects the pipe for cracks or damage; if the pipe is compromised, it will need to be replaced too, which adds to the cost and time.

Installing the new pump

Before the new pump goes in, the contractor confirms it is the right size for your well. Pump size is measured in horsepower and gallons per minute (GPM). A pump that is too small will not meet your household demand; one that is too large will cycle on and off too often and wear out faster. The contractor uses your well depth, the well's flow rate (how many gallons per minute the well can produce), and your household size to choose the right pump.

The new pump is attached to the drop pipe at the surface, then the whole assembly is lowered back into the well using the winch. The electrical line is connected as the pipe descends. Once the pump reaches the bottom, the contractor reconnects the drop pipe to the pressure tank, restores power at the breaker, and tests the system. Water should flow to your taps and the pressure gauge should read between 40 and 60 pounds per square inch (PSI), which is the normal range for household wells.

Permits and licensing requirements

Most states require a licensed well contractor to replace a submersible pump. Licensing rules vary by state—some states require a separate well pump license, others fold it into a general well contractor license, and a few require only a plumbing license. Check with your state's department of environmental quality or health department to find out what is required in your area.

Many counties and municipalities also require a permit before pump replacement work begins. The permit ensures the work meets local well codes and that the old pump is disposed of properly. Your contractor should handle the permit process, but confirm this before hiring. If a permit is required and the work is done without one, you may face fines or be unable to sell your house later because the work was not documented.

What to do while you wait for the pump to be replaced

Once your pump fails, you have no water until it is replaced. If you need water for drinking, cooking, or basic hygiene before the contractor can arrive, you will need to bring it in from elsewhere—bottled water, a neighbor's hose, or a water delivery service. Some contractors can schedule replacement within a few days; others may take a week or longer depending on their workload and parts availability.

If you have a storage tank or cistern on your property, you may be able to use that water temporarily, but do not drink it unless you know it is clean. If you have a second well on the property, you can use that while waiting. Call your contractor as soon as you realize the pump has failed and ask for an estimated arrival date. The sooner you schedule, the sooner you will have water again.

Cost factors and getting quotes

The total cost of pump replacement depends on several things: the depth of your well, the size and type of pump needed, whether the drop pipe needs replacement, local labor rates, and whether a permit is required. A shallow well (under 100 feet) with a standard pump in a rural area might cost $2,000 to $3,500. A deep well (300+ feet) or one requiring a high-capacity pump can run $4,000 to $6,000 or more.

Get written quotes from at least two licensed contractors. Each quote should list the pump model, the labor cost, whether the drop pipe will be inspected or replaced, and the timeline. Ask whether the quote includes the permit fee and disposal of the old pump. Some contractors include these; others bill them separately. A detailed quote helps you compare apples to apples and understand where your money is going.

Frequently Asked Questions

Can I replace the pump myself?

Most states do not allow homeowners to replace a well pump without a license, and many insurance policies will not cover water damage or contamination if unlicensed work was done. The equipment needed—a winch, electrical testing tools, and knowledge of well codes—is beyond what most homeowners have. Hire a licensed contractor to avoid legal and safety problems.

How long does pump replacement take?

The actual replacement usually takes four to eight hours depending on well depth and how easily the old pump comes out. If the drop pipe is damaged or needs replacement, add several more hours. The contractor may need to return the next day if the work runs late. Ask for a time estimate when you schedule.

What if my well is very deep?

Deep wells (over 300 feet) take longer to pull and install because more pipe must be handled. The pump may also need to be a higher horsepower model to push water that far, which costs more. Confirm your well depth with the contractor before getting a quote—you can also check your well drilling records or ask a previous owner.

Will I need to replace the drop pipe too?

The contractor will inspect the drop pipe as it comes out. If it has cracks, corrosion, or leaks, it should be replaced. A new drop pipe adds $500 to $2,000 to the cost depending on well depth and pipe material. Sometimes the old pipe is fine and can be reused, which saves money.

What happens to my old pump?

Most contractors will haul away and recycle or dispose of the old pump as part of the job, though some charge a small fee for disposal. Confirm this is included in your quote. Do not try to dispose of the pump yourself—it contains oil and electrical components that require proper handling.