Low Water Pressure in House with Well (Troubleshooting Guide)

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Quick answer
Confirm the symptom
Tools and prep
Step-by-step troubleshooting
Common causes table
Parts matching
When to call a pro
FAQ
Related guides

Quick answer

Check the pressure tank's air pressure, inspect the well pump, and look for leaks. Clean or replace filters and ensure the pressure switch is functioning properly.

Confirm the symptom

Water pressure is low throughout the house
Well pump runs longer than usual
Pressure tank is not maintaining pressure
Water pressure fluctuates
Low pressure only during peak usage times

Tools and prep

Pressure gauge
Adjustable wrench
Screwdriver
Bucket and rags
Well pump manual
Turn off power to the well pump at the circuit breaker
Shut off the main water supply if necessary

Step-by-step troubleshooting

Check Pressure Tank Air Pressure
Do: Use a pressure gauge to test the air pressure in the pressure tank.
Observe: Air pressure should match the cut-in pressure (usually 2 psi below the switch setting).
Means: If pressure is low, add air using an air compressor.
Next: Test the water pressure again after adjusting the air.
Inspect Pressure Switch
Do: Check the pressure switch for proper operation and wiring.
Observe: Switch should activate when the pressure drops to the cut-in setting.
Means: If the switch is faulty, it may need adjustment or replacement.
Next: Test the system after adjusting or replacing the switch.
Check for Leaks
Do: Inspect the pressure tank, pipes, and connections for visible leaks.
Observe: Look for wet spots, rust, or dripping water.
Means: Leaks can cause loss of pressure and should be repaired immediately.
Next: Repair or replace damaged components and retest the system.
Test the Well Pump
Do: Turn on a faucet and listen for the pump to activate.
Observe: The pump should start when the pressure drops below the cut-in setting.
Means: If the pump does not start, it may be faulty or have electrical issues.
Next: Consult a professional if the pump is not functioning correctly.
Clean or Replace Filters
Do: Remove and clean the sediment filter or replace it if it is clogged.
Observe: Clean filters should allow water to flow freely without restriction.
Means: Clogged filters can significantly reduce water pressure.
Next: Flush the system and check for improved pressure.
Check Water Level in Well
Do: Use a well sounder or electronic level meter to check the water level in the well.
Observe: The water level should be sufficient to allow the pump to operate effectively.
Means: Low water levels can cause the pump to run dry and reduce pressure.
Next: If the water level is low, investigate the cause and address it.
Inspect Check Valve
Do: Check the check valve near the pump to ensure it is functioning properly.
Observe: The valve should prevent water from flowing back into the well when the pump is off.
Means: A faulty check valve can cause pressure loss and pump short cycling.
Next: Replace the check valve if it is not working correctly.
Test Electrical Connections
Do: Inspect the electrical connections to the pump and pressure switch.
Observe: Connections should be secure and free from corrosion or damage.
Means: Loose or damaged connections can prevent the pump from operating correctly.
Next: Tighten or replace connections as needed and test the system.

Common causes

Cause	Likelihood	Difficulty	Part often needed
Clogged Sediment Filter A clogged filter restricts water flow, reducing pressure.	Common	Easy	Sediment filter
Low Air Pressure in Pressure Tank Low air pressure in the tank reduces the tank's ability to maintain pressure.	Common	Easy	Air compressor
Faulty Pressure Switch A malfunctioning pressure switch can prevent the pump from turning on or off properly.	Sometimes	Medium	Pressure switch
Leak in the System Leaks in the pipes or tank can cause pressure loss and reduced water pressure.	Sometimes	Medium	Pipe repair kit or replacement parts
Worn or Faulty Well Pump An aging or damaged pump may not generate sufficient pressure.	Sometimes	Hard	Well pump
Low Water Level in the Well Insufficient water in the well can cause the pump to run dry and reduce pressure.	Sometimes	Hard	Well water level testing equipment
Faulty Check Valve A malfunctioning check valve allows water to flow back into the well, causing pressure loss.	Rare	Medium	Check valve
Corroded or Damaged Electrical Connections Poor electrical connections can prevent the pump from operating correctly.	Rare	Medium	Electrical connectors or wiring

Parts matching

Common parts needed to fix low water pressure in a home with a well include:

Sediment filter
Air compressor
Pressure switch
Pipe repair kit
Well pump
Check valve
Electrical connectors or wiring

Always refer to your well pump manual for specific part recommendations and installation instructions.

When to call a professional

The well pump does not start or makes unusual noises
You suspect a leak in underground pipes
The pressure tank needs to be drained or serviced
Electrical issues are suspected or complex repairs are needed
Water pressure remains low after trying all troubleshooting steps

FAQ

How often should I check the air pressure in my pressure tank?

Check the air pressure in your pressure tank every 6 to 12 months to ensure it matches the cut-in pressure setting.

Can a clogged filter really cause low water pressure?

Yes, a clogged sediment filter can significantly restrict water flow and reduce pressure throughout the house.

What should I do if my well pump runs continuously?

If your well pump runs continuously, it could indicate a leak in the system or a faulty pressure switch. Turn off the power and consult a professional.

How can I tell if my pressure switch is faulty?

A faulty pressure switch may not activate when the pressure drops to the cut-in setting. Test the switch with a multimeter or consult a professional.

What causes low water levels in a well?

Low water levels can be caused by drought, high water usage, or issues with the well itself. Use a well sounder to check the water level.