In Plain English
Quick Answer
A pump in a basement pit that automatically pumps out groundwater before it can flood the basement.
Definition
Definition
A pump installed in a pit (sump) at the lowest point of a basement or crawlspace to collect and discharge groundwater that accumulates around the foundation. Submersible sump pumps sit in the pit while pedestal pumps have the motor above the pit. Battery backup systems maintain operation during power outages when flooding risk is highest.
Context
Why It Matters in Bidding
On projects with basements, crawlspaces, or high water tables, the sump system is a small line item with outsized risk, since failure means water damage claims and warranty callbacks. Estimators should confirm whether the spec requires battery or backup pumps, alarms, and a tied-in discharge, because those add-ons and the associated electrical and excavation scope are easy to miss between the plumbing and sitework trades.
Example
Example
Pricing a residential foundation in a high-water-table area, the estimator carries a primary submersible sump pump plus a battery-backup unit and a dedicated circuit so the basement stays dry during a storm-driven outage.
See Also
Related Terms
FAQ
Questions Contractors Ask
What should an estimator include when pricing a sump pump system?
Beyond the pump, scope the sump pit and liner, check valve, discharge piping to an approved point, a dedicated electrical circuit, and any spec-required battery backup or high-water alarm. Coordinate excavation and electrical between trades. Confirm discharge location compliance with local code, since improper routing can trigger inspection failures and rework.
Is a battery backup sump pump usually required?
It depends on the spec, code, and flood risk, not a universal rule. Backups matter because outages often coincide with the storms that cause flooding. If the documents require one, price the backup pump, battery, and charger; if silent, flag it as a recommended option rather than assuming it is included.
What is the difference between a submersible and a pedestal sump pump?
A submersible pump sits inside the pit, runs quieter, and handles more debris, while a pedestal pump keeps its motor above the pit, costing less and easing service. The choice affects pit sizing, pricing, and longevity, so estimators should match the pump type to the specified product and the installation condition.
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