Why Does My Well Have Low Water Pressure?
Low pressure on a private well usually points to the pressure tank or switch settings, a clogged filter, or a worn pump. A safe, logical checking order saves time.
Quick Answer
On a well system, "pressure" is governed by the pressure switch and the pressure tank. The most common causes of low pressure are an incorrect or failing pressure switch setting, a waterlogged pressure tank (lost air charge), clogged filters or fixtures, a stuck check valve, or a worn/undersized pump. Start with the cheap, safe checks — filters and the pressure gauge — before suspecting the pump.
What to check first (safe for homeowners)
- 1Replace or inspect any whole-house sediment/carbon filters — a clogged filter is a frequent, cheap cause.
- 2Check whether it is one fixture or the whole house. One fixture points to an aerator or fixture clog.
- 3Read the pressure gauge: note the cut-in and cut-out pressures as the pump cycles (common settings are 30/50 or 40/60 psi).
- 4Tap the pressure tank: a healthy tank sounds hollow on top and solid at the bottom. A tank that is heavy/solid throughout may be waterlogged.
Electrical and pressurized components
Common causes
| Symptom | Likely cause |
|---|---|
| Pressure drops fast, pump cycles rapidly | Waterlogged pressure tank (lost air charge) |
| Low everywhere, filters clean | Pressure switch setting, failing pump, or clogged pipe/screen |
| Low at one fixture only | Clogged aerator, cartridge, or supply line to that fixture |
| Gradually worsening over months | Pump wear, scaling, or well yield changes |
When to call a professional
Call a professional if the pressure tank needs recharging or replacing and you are not comfortable doing it safely, if the pump is short-cycling, if you suspect a failing pump or dropping well yield, or if any electrical work is involved.
Frequently asked questions
- What pressure should a well system run at?
- Residential well systems commonly use a pressure switch set to 30/50 or 40/60 psi (cut-in/cut-out). The correct setting depends on your equipment; the pressure tank’s air pre-charge is typically set about 2 psi below the cut-in pressure. A professional can confirm the right values for your system.
Sources & references
- Protect Your Home’s Water: Private Wells — US EPA, accessed October 22, 2026
This guide is documentary research and general information, not a laboratory analysis or professional assessment of your specific well. See our disclaimer.