Why is there no water after a power outage?

No power means no water, and here's exactly how much you have left

If you're on a well, your water comes from an electric motor hanging on a pipe a few hundred feet down a hole in the ground. It has no backup. When the utility drops, the pump stops that same second. There is no municipal main holding pressure behind your house and nothing in the system that keeps working.

What you do have is the pressure tank. It holds a cushion of compressed air that keeps pushing water into the house after the pump stops, and that's your reserve. It is smaller than people expect. A common 30 to 44 gallon tank delivers roughly ten to twenty gallons of usable water before the pressure falls to nothing, not the number stamped on the label. That's a couple of toilet flushes, some hand washing, and you're done.

Toilets are the thing that catches people. The tank on the back of the bowl gives you one flush. After that, the fill valve has nothing to draw from. You can flush a toilet manually by dumping two or three gallons of water fast into the bowl itself, which is the reason experienced well owners fill a bathtub when a storm is in the forecast. Pool water, snow melted on a woodstove and rain caught in a bucket all work for that job.

One thing to skip: don't keep running faucets hoping something comes back. All you do is spend the reserve you'd rather have for the toilet.

What to do before the power goes out

When there's a named storm on the way or the forecast says heavy wet snow and wind, you have an hour of easy work that changes how the next three days feel. Fill the bathtubs. A standard tub holds forty to fifty gallons and that's your flushing water. Fill jugs and pitchers for drinking and cooking, and run the dishwasher and a load of laundry before the lights go out rather than after.

Fill anything with a lid for the animals, and top off the pet bowls. If you have a generator, start it now and confirm it runs, rather than finding out at 11pm in the rain that last year's fuel has gone bad. Fuel stabilizer or draining the carburetor at the end of the season is the difference between a generator and a heavy box.

Then the step almost nobody takes. Once the power actually drops, go shut the pump breaker off. Not the main, just the pump. It costs nothing and it takes the motor out of the line of fire for what happens next.

The surge that comes back with the lights

Here's what surprises homeowners. The outage itself does nothing to your pump. A motor sitting with no power sits there. The damage happens in the moment power is restored, and restoration is rough. The utility re-energizes a circuit that has been sitting dead, sometimes reclosing several times in a few seconds while a crew works down the line, and voltage can come back low, come back in a spike, or flicker on and off repeatedly before it settles.

A motor hates all three of those. Low voltage means the pump draws higher current trying to make the same work, and current is heat in the windings. Repeated on-off in quick succession means the motor repeats its starting inrush over and over with no cooling time between. A spike stresses the insulation and the capacitors. This is why a pump that was perfectly healthy Friday afternoon is dead Sunday morning after the crews restored the neighborhood.

So the rule is simple. During a long outage, shut the pump breaker off. When you see the lights come back, leave it off. Give it ten minutes of steady power, watch that the lights aren't flickering and the refrigerator has settled into a normal run, and then switch the pump breaker on. You have missed nothing by waiting ten minutes and you may have saved a pump.

The same logic applies to well control equipment. If you have a constant pressure drive or any electronic pump controller, those boards are more surge sensitive than the motor itself, and a surge protector on that circuit is genuinely cheap insurance.

The breaker that looks fine but isn't

Power's back, the kitchen lights work, and you have no water. Start at the panel. Your pump is on a 240 volt circuit, which means a two pole breaker: a double wide device with two handles joined by a bar. Common sizes are 15, 20 or 30 amp depending on the pump.

A tripped breaker frequently does not look tripped. The handle rests in a middle position that reads as on at a glance. Push it all the way to off, feel it click past the trip position, then push it firmly to on. If it holds, run a faucet and see whether pressure builds. If it snaps right back off, stop. Something downstream is drawing a fault and repeatedly resetting it damages both the breaker and the pump.

Then there's the failure that fools everybody. A two pole breaker feeds two hot legs, and one leg can fail while the handle still looks perfectly set. Now the motor has 120 volts across a circuit that needs 240. It can't turn. It sits there and hums, drawing locked rotor current, cooking itself. If you hear a hum from the well head or the control box with no water building, shut it off inside ten seconds. That hum has a clock on it. This same single leg failure happens at the well cap and in a corroded outdoor disconnect, not only in the panel.

One more thing to look at while you're there. If the pump breaker holds fine but the pump still doesn't run, the pressure switch may have burned its contacts during the flicker. That's a small part on the tank tee, and it's a common casualty of a bad restoration.

The control box, and the capacitor that dies in a surge

If you have a three wire submersible pump, there's a metal or plastic box mounted in the basement or on the wall near the tank, and inside it are a start capacitor and a relay. The capacitor gives the motor the kick it needs to break away from a dead stop. The motor cannot start without it.

Capacitors are the part in your whole well system most likely to be killed by a surge. They store and release voltage by design, and a spike is exactly the abuse they don't survive. A pump with a failed start capacitor makes a very specific set of symptoms: a hum or a click at the box, no water, and a breaker that either trips in a few seconds or holds while nothing happens. Sometimes you can smell it. A cooked capacitor puts a sharp burnt smell in the box, and the can itself may be bulged at the top or split.

The good news is that this is one of the least expensive repairs in the trade. A control box repair generally lands in the low hundreds of dollars, and it takes one visit with no rig, no pulling the well and no digging. The bad news is that people assume the worst after a storm, hear no water, and start pricing a pump replacement for a problem that's a part the size of a soda can.

Two wire pumps have no control box, because the starting components live down in the motor itself. That's simpler but it also means a starting failure on a two wire pump requires pulling the pump. If you don't know which you have, look for that box on the wall. A box means three wire.

Generators: what will actually start a well pump

This is where a lot of money gets wasted. A submersible pump draws a modest amount of electricity while it's running and an enormous amount for the fraction of a second it takes to start. That starting draw is locked rotor amps, and it's the number that decides whether a generator can run your well.

Real figures. A half horsepower submersible on 240 volts runs at roughly 5 to 6 amps, about 1,300 watts. Its locked rotor draw is in the 25 to 30 amp range, so you're asking the generator for something like 4,000 to 5,000 watts for an instant. A one horsepower pump runs at roughly 9 to 10 amps, about 2,300 watts, with locked rotor in the 40 to 50 amp range and a starting demand of 7,000 watts or more. Deep settings and long wire runs push all of those numbers up.

So the practical answer: plan on a 5,000 watt generator minimum with a true 240 volt output for a half horsepower pump, and 7,500 watts or more for a one horsepower. And here's the part that catches people every storm. The small quiet inverter generators, the 2,000 and 2,200 watt units everybody owns for tailgating, have 120 volt outlets only. There is no 240 volt output on them at all. It isn't a question of being a little short on wattage. That generator physically cannot power your well no matter what cord you buy.

How you connect it matters as much as the size. A pump is hard wired, so there's no cord to plug in. That means a transfer switch or an interlock kit installed at the panel by an electrician, which is a real electrical job and worth every dollar in a region that loses power the way ours does. Never energize your house by running a cord from a generator into an outlet. Backfeeding puts live voltage on the utility lines outside and it has killed line workers.

When the power is back, steady, and you still have no water, we're the call. 973-853-1550. Tell us whether the breaker holds, whether you hear a hum, and whether the gauge on the tank moves at all. Post storm we're triaging by who has nothing, and those three answers put you in the right place in the line.