Well systems
Diagnose the system before anyone pulls the pump
On a private well the pump gets blamed for almost everything, and it is frequently innocent. A failed pressure tank, a burnt pressure switch, a bad capacitor or a leaking check valve all produce symptoms that look exactly like a dying pump, and none of them need a rig.
Statewide. On a well, you are the water utility, the diagnosis matters as much as the repair.
Diagnosis
The four symptoms, and what usually causes them
Each points somewhere specific, and only one of them usually means the pump.
Rapid short cycling
The pump clicking on and off every few seconds. Almost always a pressure tank that has lost its air charge or ruptured its bladder. It destroys pumps and switches quickly, so it is worth acting on immediately.
Air spitting from the taps
Air entering the system, a dropping water level, a leak in the drop pipe, a failed check valve, or a well recovering more slowly than the household draws. Distinct from a pressure problem.
No water at all
Check the breaker and the pressure switch contacts first. Burnt switch contacts, a failed capacitor or a bad control box are common and inexpensive; a failed submersible pump is neither.
Pressure that will not build
A worn pump, a leaking drop pipe, a stuck check valve or a switch set wrong. Gauge readings across a fill cycle usually separate these without any excavation.
Short cycling right now? Shut it off, cycling is what kills the pump.
Get It CheckedHow we work
A diagnosis sequence that avoids unnecessary work
Electrical and controls first
Breaker, pressure switch contacts, control box, capacitor and voltage at the switch. This is quick, it is where a large share of no-water calls actually end, and it costs a fraction of pulling a pump.
Then the pressure tank
Check the air charge at the schrader valve with the system depressurised, and check whether water comes out of it, which means a ruptured bladder. Tank faults cause most cycling complaints and are straightforward to correct.
Then the well itself
Static and pumping water level, drawdown, recovery rate, amp draw against the nameplate, and the condition of the drop pipe and check valve. Only after all of that does pulling the pump become the right recommendation.
Short cycling is an emergency for the equipment
Every start is the hardest moment in a pump motor’s life. A tank with no air charge can put a pump through thousands of extra starts in a week, and it turns a cheap tank repair into a pump replacement.
Pressure tank air charge should sit two psi below the cut-in pressure of the switch, commonly 38 psi for a 40/60 system. Checked with the system depressurised, it is a five-minute test that prevents the most expensive failure on the system.
The system
What each component does, and how it fails
A well system has five parts that matter, and the symptoms make sense once you know which is which.
The pump
Submersible units sit down the well and last ten to twenty-five years; jet pumps sit above ground on shallow wells and are easier to reach. Failures come from cycling, sediment, lightning and age, cycling most of all.
The pressure tank
Provides the buffer so the pump is not starting every time a tap opens. When the bladder fails, the buffer disappears and cycling begins. Tanks are consumable parts on a ten to fifteen year horizon.
The pressure switch
A simple mechanical switch that starts and stops the pump at set pressures. Contacts burn and pit, and a burnt switch is one of the most common causes of a total no-water call.
Check valve and drop pipe
Hold water in the column and carry it up. A failed check valve lets the column drain back, which produces both cycling and air at the taps, and it is often mistaken for a pump problem.
Pulling a pump before checking the switch, the capacitor and the tank is the most expensive shortcut in well work.
On a well and something is wrong? Describe the symptom and we will narrow it on the phone.
Talk to a Pro TodayKentucky specifics
What the local conditions demand
Karst geology, variable recovery rates, and a large rural well population.
Karst limestone
Wells respond fast to weather
In karst country, surface water reaches the aquifer through fractures and sinkholes quickly, so both water level and clarity can change within hours of heavy rain.
Sediment filtration sized for surges, and a bacteria test after any event that visibly changes the water.
Recovery rate
Not every well keeps up
A well can hold enough water and still deliver poorly if it recovers slowly, which shows up as air spitting and pressure loss during heavy household use.
Measuring drawdown and recovery tells you whether the answer is a pump, a larger tank, or storage.
Sediment and iron
They wear pumps and foul everything
Kentucky groundwater commonly carries sand, iron and manganese. Sediment abrades pump components and iron fouls softener resin downstream.
Filtration in the right order protects both the pump and the treatment equipment behind it.
Storms and lightning
A real failure mode here
Rural electrical supply and summer storms mean surge damage to pumps, control boxes and switches is a genuine and recurring cause of failure.
Surge protection at the control box is inexpensive next to a pump replacement.
Tell us the symptom, cycling, air, no water, or weak pressure. They point different directions.
Related work
Treatment that belongs downstream, and the pressure side of the system.
Questions
Well systems, answered straight
Short cycling, and the cause is nearly always the pressure tank, either the air charge is gone or the bladder has ruptured. It is important to act quickly, because every one of those extra starts wears the pump motor. Tank repair or replacement is far cheaper than the pump it protects.
Air is entering the system. Common causes are a dropping water level in the well, a leak in the drop pipe, a failed check valve letting the column drain back, or a well that recovers more slowly than the household is drawing. It is a different diagnosis from a pressure complaint.
Not necessarily, and it is the last thing to assume. Check the breaker, then the pressure switch contacts, the capacitor and the control box, burnt contacts and failed capacitors are common and inexpensive. Only when the controls test good does the pump itself become the likely answer.
A submersible pump commonly runs ten to twenty-five years. Short cycling, heavy sediment and electrical surges cut that considerably. A pump that failed at eight years usually had a reason, and finding it is worth doing before fitting the replacement.
The air charge should be about two psi below the switch cut-in pressure, so 38 psi on a common 40/60 system, measured with the system depressurised. If water comes out of the air valve instead of air, the bladder has failed and the tank needs replacing.
Bacteria and nitrates annually, and a broader panel every few years or whenever the water changes in taste, smell or appearance. On a private well nobody else is testing it, the homeowner is the whole quality programme.
It is common in karst areas where surface water reaches the aquifer quickly, but it is also a sign that surface contamination has a route in. Test for bacteria after any event that visibly changes the water, and have the wellhead, casing and cap checked.
Usually yes, if the tank is more than ten years old. Most of the labour is shared, a failing tank is what destroys the new pump, and doing them separately means paying for the visit twice.
On a well, the diagnosis is most of the value
Controls, then tank, then well. Pulling a pump is a conclusion, not a starting point.