Choose a guide by the problem you can observe: how the pump behaves, where water appears, or which backup or repair decision you need to make. Our guides distinguish observations from possible causes and point to model-specific manuals when needed.
Jump to: Pump symptoms · Basement water and drains · Backup systems · Costs
Diagnose a sump pump
Begin with what the pump is doing—silent, running, cycling, noisy or producing an odor—rather than guessing which part failed.
Sump pump troubleshooting
Use the overall symptom map when you do not yet know which problem you are seeing.
Running but not pumping water
The motor runs but the pit level does not fall. Compare discharge, check valve, intake and pump possibilities.
Running constantly
Separate high inflow, float or control problems, and water returning after shutdown.
Making noise
Match humming, banging, gurgling, grinding or rattling to the moment it occurs.
Smells near the sump pit
Recognize differences between musty water, sewage, gas, chemicals and burning smells.
Check valve and backflow
Understand valve function, short cycling, shutdown bangs, leaks and model-specific installation questions.
Basement water, drains and flooding
Use where and when the water first appeared to distinguish different routes into the basement.
Flooded basement: what to do first
A safety-first sequence for active flooding, documenting damage, cleanup and finding the underlying source.
Water after heavy rain
Map the first wet point: sump, wall-floor joint, window well, crack, wall or floor drain.
Water seeping through the basement floor
Separate groundwater seepage from floor-drain, plumbing and condensation clues before choosing a repair.
French drain in basement: interior vs exterior
Compare interior perimeter and exterior footing drains, when they may fit, sump or outlet requirements, and what a contractor quote should explain.
Waterproofing basement walls from inside
Compare interior coatings, localized crack repair and drainage systems by the moisture pathway they are intended to control.
Basement floor drain backing up
Use fixture activity, rainfall and contamination clues to choose the next professional or utility contact.
Backup systems and maintenance
Choose protection based on the failure you need it to cover, the home’s utilities and the exact equipment specifications.
Compare sump pump backup types
Compare a second battery pump, inverter, water-powered backup and generator by failure mode and limits.
Water-powered backup requirements
Check municipal water availability, dynamic pressure, backflow requirements and real pumping output.
Backup battery replacement
Check controller, chemistry, voltage, group size, capacity, terminals and testing before choosing a battery.
Costs and project planning
Compare quotes only after the scope is clear: replacing a pump and building a new sump system are different jobs.
Sump pump replacement cost
Understand published U.S. estimates and what a like-for-like replacement quote may include.
Sump pump installation cost
Separate existing-basin work from new pits, drainage, discharge, electrical and restoration work.
Basement waterproofing cost
Compare current U.S. planning ranges by method, then normalize contractor quotes by water pathway, treatment area, drainage, discharge and restoration scope.
How to use these guides
Start with safe observations, then check the detailed guide and the manual for your exact system. A symptom alone does not confirm a fault, and local plumbing requirements can differ. For our sourcing and correction process, see the Editorial Policy.