Well Pump Maintenance and Service Guide

Why it matters

A well-maintained pumping system is the difference between reliable running water and a sudden, expensive emergency. While the pump itself is often submerged hundreds of feet underground, the components you can service—the pressure tank, pressure switch, and electrical connections—dictate how hard that pump has to work.

Maintaining your well pump system provides three primary benefits:

1. Extended Pump Life: By ensuring the pressure tank has the correct air charge, you prevent "short-cycling" (the pump turning on and off too rapidly). Short-cycling is the leading cause of motor burnout.
2. Energy Efficiency: A system tuned to the correct pressure settings operates more efficiently, reducing the electrical draw required to move water into your home.
3. Water Consistency: Proper maintenance eliminates surging water pressure and ensures your fixtures receive a steady stream.

How often

You should perform a basic inspection and pressure tank check once a year. Many homeowners choose to do this in the spring when the ground thaws or in the fall before freezing temperatures arrive. If you notice your pump clicking on and off frequently, or if your water pressure fluctuates wildly, perform these checks immediately regardless of the schedule.

What you need

Most well pump maintenance involves the "above-ground" components. You will need:

• Tire pressure gauge: To check the air pressure in the bladder tank.
• Air compressor or manual bike pump: To add air to the tank.
• Flathead and Phillips screwdrivers: To remove the pressure switch cover.
• Emery cloth or fine-grit sandpaper: To clean electrical contacts.
• Multimeter: To check for proper voltage (optional but recommended).
• Flashlight: To inspect for leaks in dark utility rooms or crawlspaces.
• Bucket: To drain the tank.

Step-by-step

Follow these steps to service the pressure tank and control system. Note: This guide covers standard "jet" and "submersible" systems using a bladder-style pressure tank.

1. Visual Inspection

Begin at the well head (the pipe sticking out of the ground outside). Ensure the cap is tight and the conduit protecting the wires is not cracked or broken. Look for signs of "heaving" where the ground may have shifted. Move inside to the pressure tank and look for any signs of corrosion, dampness, or "sweating" which could indicate a pinhole leak or a failing bladder.

2. Check for Short-Cycling

Turn on a bathtub or garden hose and watch the pressure gauge on your tank. Note the "cut-in" pressure (when the pump turns on) and the "cut-out" pressure (when it turns off). If the needle bounces back and forth rapidly every few seconds, your tank is likely waterlogged and needs immediate attention.

3. Test and Adjust the Pressure Tank

This is the most critical maintenance task.

1. Cut the power: Turn off the circuit breaker dedicated to the well pump.
2. Drain the system: Open a faucet (usually a boiler drain at the base of the tank) and run the water until the pressure gauge reads 0 PSI. The tank must be empty of water to get an accurate air pressure reading.
3. Check air pressure: Remove the small plastic cap on top of the tank (it looks like a car tire valve). Use your tire gauge to check the pressure.
4. Calculate the target: Your air pressure should be 2 PSI below the cut-in pressure. For example, if your pump turns on at 30 PSI, your tank should have 28 PSI of air.
5. Adjust: Use your compressor or bike pump to add air if it's low. If water squirts out of the valve when you check the pressure, the internal bladder has ruptured, and the entire tank must be replaced.

4. Clean the Pressure Switch

The pressure switch is the "brain" of the system.

1. Ensure the power is still OFF.
2. Remove the plastic cover (usually held by a single nut).
3. Look for "pitting" or burnt marks on the silver contact points.
4. Gently slide a piece of emery cloth or fine sandpaper between the contacts to remove carbon buildup.
5. Check for insects or debris inside the housing, as spiders are notoriously drawn to the warmth of these switches.

Safety

• Electrical Hazard: Well pumps run on 240V electricity, which can be fatal. Always turn off the breaker and use a non-contact voltage tester to verify the power is off before touching the pressure switch.
• Pressure Hazard: Never attempt to unscrew pipes or components while the system is pressurized.
• Sanitation: If you open the well cap or perform repairs on the piping, the system may need to be "shocked" with chlorine to kill any introduced bacteria.

When to call a pro

While homeowners can handle tank pressure and switch cleaning, call a licensed well technician if:

• The pump won't turn on: Even after checking the breaker and the pressure switch.
• Sputtering air: If your faucets are "coughing" air, you may have a leak in the drop pipe or a lowering water table.
• Low yield: If your well is running dry or the recovery rate has slowed significantly.
• Sediment issues: If you suddenly see large amounts of sand or silt in your water, the well screen or casing may be damaged.
• Deep-well repairs: Any work requiring the removal of a submerged pump requires specialized pulling rigs and expertise.

Cost

• DIY Maintenance: $0 – $20 (cost of a gauge or sandpaper).
• Pressure Switch Replacement: $30 – $60 for the part; $150 – $300 for pro installation.
• Pressure Tank Replacement: $400 – $800 for the tank; $800 – $1,500 total for pro installation.
• Submersible Pump Replacement: $1,500 – $4,000 depending on depth and horsepower.

Performing the 15-minute annual air pressure check can prevent the $4,000 pump replacement.