Your sump pump just failed during a heavy Missouri rainstorm and water is creeping across the basement floor. What now? Work the sequence: power, float, discharge, manual backup, damage triage. Ten calm minutes protect the room while you arrange help, and this guide is the sequence our technicians run on storm nights.
Step 1: Check Power Before You Blame the Pump
Half of storm-night “pump failures” are power problems wearing a costume. Confirm the pump’s circuit or plug did not trip, especially if it shares a circuit with a freezer or dehumidifier that kicked on with the storm. If the house has power but the pump does not run, move to step two. If the whole house is dark, the pump is innocent; you need a backup plan, not a repair.
Step 2: Test the Float
The float is the pump’s trigger, and debris jams it more than anything else. Lift the float by hand (use something long; stay out of the water) and listen for the click. If the pump roars to life, the failure was a stuck float, often from gravel or silt in the pit. If lifting the float does nothing, power is arriving but the motor is not answering: seized impeller, dead capacitor or a failed switch.
Step 3: Check the Discharge Line
A pump that runs but leaves water standing may be pumping into a frozen, crushed or disconnected discharge line. Follow the pipe from the pump to where it exits the house; ice blockages happen in cold snaps, and burst or shifted lines happen after mowing seasons. Water cycling back into the pit points to a failed check valve, a cheap fix in calm weather.
Step 4: Manual Backup Options, Ranked
- Wet/dry vacuum plus a floor drain: buys time in a creeping-water situation, not a gusher.
- A utility pump borrowed from a neighbor: any pump beats no pump; drop it in the pit with an extension cord to a live circuit.
- Water-powered backup pump: if you have municipal supply and one is installed, it runs on water pressure, no electricity needed. Storms and outages are exactly when it earns its keep.
- Damage triage: move valuables up, kill power to affected outlets at the breaker, and keep everyone out of standing water near energized equipment.
Step 5: Call Before the Water Wins
Our sump pump repair team runs storm-priority dispatch. Say the words “water is rising” and you move up the board. After the immediate visit, the lasting fix usually costs less than homeowners expect: a quality pump swap, a check valve, pit cleaning and, for finished basements, a battery backup with an alarm so the next outage announces itself instead of flooding you.
The Calm-Weather Version of This Guide
Every failure above is testable on a sunny Saturday: pour five gallons into the pit, watch the full cycle, confirm the discharge line flows outside, and listen for the click. Do it every spring and fall. The homeowners who run that test twice a year almost never meet us at midnight; the ones who skip it keep our storm nights busy. Choose boring." : The Cleanup That Protects the Room Once the pump is running again or the storm has passed, a short cleanup protocol protects both the room and your claim. Photograph everything before moving items: water lines on walls, wet carpet, any damaged belongings, and the pump itself in its pit. Pull wet carpet pad if water reached it; pad holds water and odor long after the surface looks dry, and fans aimed across the floor for a day or two finish the job. Kill power to any outlet that sat in water until an electrician or a qualified test clears it, and never stand in water to reach a live panel. Disinfect hard surfaces that contacted storm water, which carries whatever the storm carried. Then, while the event is fresh, call your insurer about whether the damage meets your deductible and what documentation they want; adjusters process tidy timelines faster. Finally, book the pump service that turns the near-miss into a non-event next time: the check valve, the float, the discharge line and, for finished rooms, the battery backup conversation.