The pit is quiet, the basement floor is wet at the edges, and the storm outside has not stopped. That is how most sump pump emergencies begin, and sump pump repair in Chesterfield, MO is rarely a job that can wait for Monday. Our 24/7 line takes exactly this call. While you wait for a plumber, keep people and cords out of standing water, lift stored items off the floor, and note whether the water is still rising.
Some pumps are dead. Others are running but moving nothing, or cycling so fast they are burning themselves out. Which one you have decides whether the fix is a new float switch, a new check valve or a new pump, so we find the cause before we quote.
When a failed sump pump and rising water cannot wait
Water that is climbing toward a furnace, a water heater, a finished floor or an electrical panel is an emergency. Call the 24/7 line and tell the dispatcher how high the water is and whether the pump is humming, silent or running. We offer same-day and after-hours appointments when a crew is available, and we give you the price before work starts.
Electricity and water do not mix. If the water is touching outlets, a panel or an electrical room, stay out and call the utility or 911 if you see sparking. Cut power at the panel only if the panel is dry and you can reach it without stepping in water.
- 1Stay out of any water that touches outlets, extension cords or the panel.
- 2Unplug the pump only if you can do it from dry ground. Never reach into a wet pit.
- 3Check the breaker or GFCI outlet the pump uses, since a tripped one looks exactly like a dead pump.
- 4Lift stored boxes, rugs and electronics to shelves or stairs.
- 5Bucket or wet-vac water out of the pit only if it is safe to do so, to buy time.
- 6Call the 24/7 line and describe what you see and hear.
What a failing pump looks like before the basement floods
Most pumps give warning. The trouble is that the warning shows up as small oddities, and nobody checks a pit that has worked for years.
The motor hums but no water moves
A jammed impeller, an airlocked pump or a failed check valve can all sound like a working pump. The pit keeps filling anyway.
It runs far more often than it used to
Short, frequent cycles point to a check valve letting water fall back into the pit or a float that sticks. Both shorten pump life fast.
A loud rattle or grinding
Gravel, a worn bearing or a bent impeller shaft. A pump making this noise is close to failing, even if it still empties the pit today.
The pump never turns on
Start with power and the float. A float wedged against the pit wall or a dead switch is cheaper to fix than a motor.
Water stands in the pit with the pump running
The discharge line may be clogged, frozen or kinked, or the pump may be too small for the inflow.
How we find out why the pump stopped
Check power first
We test the outlet, the GFCI and the circuit with a meter. A surprising number of dead pumps are a tripped breaker after a power flicker.
Test the float and the switch
We lift the float by hand and watch whether the pump starts. A float that sticks is a cheap repair. A switch that fails sometimes is a reason to replace the pump.
Look at the pit and the impeller
Silt, gravel and debris in the bottom of the pit cause many jams. If the pump pulls out cleanly, we inspect the impeller and screen.
Follow the discharge line
We trace the pipe outside to confirm water is leaving the house and not draining back. A check valve that has failed is one of the most common finds.
Run a fill test
We add water to the pit and watch a full cycle. The pump should start, empty the pit and shut off without chattering.
Tell you what the repair is worth
If a pump is old and the motor is tired, we say so. Replacing it can cost less than a second emergency visit.
Pit filling and the pump silent?
Check that it has power, then call if the float or motor is not moving.
Symptom, likely cause and what happens next
The same dead-pit picture can have very different causes. This table shows what we usually find and the usual next step.
| What you see | Likely cause | Usual next step |
|---|---|---|
| Silent pump, no water movement | Tripped GFCI, dead switch or burned motor | Test power, then float, then replace pump if the motor is gone |
| Humming with no flow | Jammed impeller or airlock | Clear debris and test. Replace if the impeller is damaged |
| Frequent short cycles | Failed check valve or sticky float | Replace the valve or reposition the float |
| Pump runs and pit still fills | Clogged, frozen or undersized discharge | Clear or re-route the line, or upsize the pump |
| Sewage smell and gurgling near a basement bathroom | Ejector pump or basin trouble | Inspect the basin, check valve and vent, then repair or replace |
| Pump fine in dry weather, fails in storms | Power loss during outages | Add a battery backup so the pump runs without house power |
Table is a guide only. We confirm the cause on site before recommending a repair.
Why the Valley's 1993 flood still matters for pumps
On the night of July 30, 1993, the Monarch agricultural levee gave way with the Missouri River more than 19 feet above flood stage. About 4,000 acres of Chesterfield Valley flooded to depths of 6 to 15 feet. The Valley had not flooded since 1935. About 240 businesses operated there beforehand and about 160 reopened.
Today the Valley sits behind the Monarch-Chesterfield Levee and is mostly offices and retail on former farmland. A levee keeps the river out. It does nothing for a power outage, a heavy local downpour or groundwater that rises against a slab. If your building has a pit, the pump and its discharge line are what protect you in the storms the levee was never meant to handle, so test them before the season, not during it.
One pump alone or a pump with battery backup
Storms often knock out power right when the pit needs the pump most. A backup system adds a second pump and a battery so the pit keeps emptying without the grid.
Primary pump only
- Lower cost to install
- Stops the moment house power drops
- Fine where the pit seldom fills or flooding risk is low
- No battery to test or replace
Primary pump plus battery backup
- Keeps pumping through a storm outage
- Needs a battery that must be tested and replaced over time
- Runtime depends on how fast water enters the pit
- Worth it where a flooded basement would damage finished space or equipment
What drives the cost of a sump pump repair or replacement
We give a clear price before work starts. These are the factors that move it up or down.
Homeowners policies commonly cover sudden accidental damage but often exclude water that enters from a failed or unpowered sump pump unless you added that coverage. Read your policy or ask your agent before you file.
Want the real number for your job? Call the 24/7 line, describe the work, and hear a clear price before anything starts.
Ejector pumps and when a new pump is not the answer
An ejector pump is a sealed unit that lifts waste from a basement bathroom or laundry up to the sewer line. A sump pump moves groundwater and storm seepage outside. They look alike but they are not interchangeable, and sump discharge should not be connected to the sanitary sewer. Ask the building department where the job is about local rules.
A new pump cannot fix a pit that is simply overwhelmed. If water is entering through the floor-wall joint or the foundation, basement waterproofing addresses where the water comes in. If the whole house drains slowly while the pit overflows, our drain cleaning crews can check whether the main line is the real problem.
We also serve nearby towns, including homes and offices in Creve Coeur and Ballwin where a failing pump can turn up the same way.
Questions about sump pump installation and repair in Chesterfield
Yes. The 24/7 line takes calls any hour, and we send a plumber the same day or the same night when a crew is available. Tell the dispatcher how high the water is.
Common causes are a failed check valve, a clogged or frozen discharge line, a jammed impeller or a pump too small for the inflow. We run a fill test to see which one it is.
It does for as long as the battery lasts, and runtime depends on how fast water enters the pit. The battery needs periodic testing and eventual replacement.
A like-for-like swap is a reasonable DIY job if you can cut power safely and fit the check valve correctly. Stop and call if the pit is flooded, the wiring is wet, or the discharge line is part of the problem.
A sump pump moves groundwater out of a pit. An ejector pump lifts sewage from a basement bathroom to the sewer line. The pits, covers and venting are different.
No. Whether a building has a pit depends on how it was built and where the groundwater sits. If you are not sure, we can look at the lowest floor and tell you.
Reference points for this page: The Uniform Plumbing Code (UPC) and the International Plumbing Code (IPC) are the model codes most U.S. jurisdictions adopt, and the local permitting authority decides which edition and amendments apply.