What a power outage means for a house on a well
On a private well, the water stops when the power does. The pump needs electricity, and the pressure tank only holds a little water in reserve. In Orange County, where storms regularly take lines down for a day or more, that makes the well the first thing to plan for.
When the power goes out in a house on a private well, the pump stops and only the water already in the pressure tank is available, usually enough for a few flushes and a little washing. Keeping water flowing means a generator connected through an interlock or transfer switch, sized for the pump's starting surge, ideally with the pump on an essential-loads plan.
Rather ask a person?(929) 755-0293Why no power means no water
A well system is a pump, a pressure tank and a pressure switch. The pump fills the tank, the switch shuts the pump off at the high setting, and the tank pushes water through the house until pressure falls and the switch starts the pump again. When the power goes out, the pump cannot restart, so the house runs on whatever is left in the tank, which in a typical tank is only a few gallons of usable water.
That is why outages hit well owners harder than town-water neighbors. No flushing beyond the first few, no showers, and in winter, a boiler that may also be down. Outages here are not rare: after one June 2024 thunderstorm, 1,267 Orange and Rockland customers in the Town of Warwick were still without power the next day.
- Fill pots and the bathtub when a big storm is forecast
- Keep a few jugs of drinking water on hand
- Know where the well pump breaker is
- Never run a generator inside or in an attached garage
- Never backfeed the house through an outlet
Keeping the pump running on a generator
A well pump draws a big surge for a moment every time it starts, several times its running current. A generator has to be sized for that starting load, not just the running amps on the pump's label, or it will stall or trip every time the pump kicks on. Pumps also need the right voltage; most deep well pumps run on 240 volts, which rules out small portable units with only 120-volt outlets.
The connection matters as much as the size. A portable generator should feed the house through an inlet box and an interlock kit or a transfer switch, never a cord into an outlet, which can push power back onto the utility lines and endanger line crews. A small essential-loads subpanel holding the well pump, the boiler and the refrigerator makes a modest generator far more useful.
Standby or portable
A portable generator with an interlock is the lower-cost route and handles most outages if someone is home to start it. A standby unit starts itself within seconds and suits houses that cannot go without water or heat, owners who travel, or anyone who has to keep a basement pump running. Either way, the well pump goes on the plan first.
Whichever you choose, keep it maintained. A generator that has not been serviced, or a battery that has quietly died, is the usual reason a well owner ends up without water despite owning a generator.
| Question | Portable with interlock | Standby with transfer switch |
|---|---|---|
| Starts | Manually | Automatically |
| Covers the well pump | If sized for the starting surge | Yes, by design |
| Best for | Shorter outages, someone home | Long outages, unattended homes |
On a well and tired of dry outages?
We plan the pump onto a generator, safely. Call any hour.
When the pump will not restart after an outage
Sometimes the power comes back and the water does not. A pressure switch with worn contacts, a failed start capacitor in the control box or a tripped breaker are the usual culprits, and all three are electrical. Check the breaker once; if it trips again or the pump hums without starting, call rather than resetting it repeatedly.
Sources
- Orange and Rockland: June 2024 storm restoration update
- This Old House: well pump cost and installation guide, 2026
- Generac: standby generator maintenance intervals
Figures are planning ranges from published sources, not quotes. Every job is priced after we see it.
Outage and well questions
Only what is in the pressure tank, usually a few gallons of usable water.
The pump's starting surge is larger than the generator can supply.
Most well pumps are hard-wired at 240 volts; connect through an interlock or transfer switch instead.
Yes, alongside the boiler and refrigerator, so a modest generator covers what matters.
Check the pump breaker once; if it trips again or the pump hums, call.
Where this guide leads
Well pump electrical
See the serviceGenerator service and maintenance
See the serviceEssential-loads subpanels
See the serviceSump pump wiring and backup
See the serviceMore guides: Local Law 97 and Your Building's Electrical Capacity and EV Charger Installation Cost in New York, NY (2026)
Plan the pump before the next storm
Call any hour and tell us how your well and generator are set up today.