What does normal pressure look like?
On a well system, pressure rises and falls within a range set by the pressure switch and tank. It will drop a bit while water runs and recover when the pump starts. Your sense of normal comes from living with the system, so it helps to note what the gauge shows when things seem fine.
Trouble is a change from your normal: pressure that falls suddenly, never recovers, swings wildly or is weak at only one fixture. Where the problem appears helps point to the cause.
A good habit is to read the gauge at the same time of day for a week, with no water running, and write down the numbers. Those readings become a baseline you can share with a professional.
Is it one tap or the whole house?
If only one fixture is weak, the cause is probably local, such as a clogged aerator, a partly closed valve or a worn cartridge. Mineral deposits and sediment often block the small openings in faucets and showerheads. Cleaning or replacing the part may fix it.
If hot water only is weak, the water heater or its lines may be involved. If every tap is weak, look toward the pump, tank, filters, main line or pressure switch.
- One tap: aerator, cartridge or valve
- Hot only: water heater or its lines
- Everything: pump, tank, filter, switch or main line
What whole house causes are common?
A clogged whole house filter is a frequent culprit. Filters catch particles, and as they fill up, flow drops. Check whether the filter is overdue for change and whether the drop in pressure started after a filter change.
A failing pressure switch, a waterlogged pressure tank, a worn pump, a leak in the buried line or a drop in the well's water level can also reduce pressure. Some of these cause the pump to run constantly. Unexplained high water use or a wet patch in the yard may point to a leak.
How can I check for a leak?
Turn off every tap and appliance and look at the pump or the water meter if you have one. If the pump keeps starting or the meter keeps moving, water is going somewhere. Check toilets, outdoor hoses, livestock waterers and any buried line for wet ground or unusually green grass.
A leak in a buried line wastes water and can pull dirt into the pipes. A professional can locate it with proper tools. Avoid digging blindly, since you may damage other lines or cables.
Do not forget the possibility of a power problem. A weak connection or a low voltage supply can make a pump behave as if pressure were failing, and an electrician is the right person to check it.
When is the well itself the problem?
Long dry spells, heavy irrigation or a decline in the groundwater level can lower the amount of water a well can deliver. You may notice sputtering, air in the lines or sand and cloudy water. A well that has run low may recover over hours, then fail again under heavy use.
Ask a licensed well contractor to measure the water level and the flow rate. They can tell you whether the pump setting, the well or the demand is the issue, and what options exist. Drought information from your state and from Drought.gov helps you understand local conditions.
When should I stop and call someone?
Call a professional when the pump runs constantly, when you see water where it should not be, when there is sand or discoloration, when the tank behaves strangely or when you smell burning from electrical equipment. Do not work on wiring or pressurized equipment yourself.
Before calling, note when the problem started, which taps are affected and what has changed recently, such as a repair, weather, filter replacement or new equipment.
How can I prevent pressure problems?
Replace filters on schedule, clean aerators now and then, repair drips quickly and have the system inspected on a regular schedule. Keep records so you can compare normal against odd.
If you add livestock, irrigation or a new bathroom, tell your contractor. More demand can reveal limits you did not notice before.
Written notes of what you already tried are worth more than most people expect. Contractors can skip steps you have already covered.
Key takeaways
- Work from one tap to the whole house to narrow the cause
- Filters and aerators are common, cheap culprits
- A pump that runs constantly needs professional attention
- Do not dig or touch wiring or pressurized parts yourself
Sources and further reading
Last reviewed: November 12, 2026. Written by the Rural Farm Life Editorial Team. See our editorial policy.