Sump Pumps: What They Are, Signs of Failure, Replacement and Backups

Updated November 1, 2026 · General information, not plumbing or electrical advice

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The short answer: A sump pump moves groundwater out of a pit in your basement and away from your foundation. Test it before the wet season, replace it when it fails (Boston's estimate is a 7 to 10 year life), and consider a backup if you lose power often or have a lot invested in the basement. Check local permit rules before installing.

This site explains sump pumps in plain words, using extension, city and consumer sources and linking to each one. We don't invent prices; where we found no sourced number we say so.

Start here: does your sump pump need a backup?

Six quick questions, based on the risk factors Ann Arbor, Michigan lists.

Open the backup checker

Guides

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Safety first. Sump pumps run on household power in a wet place. Unplug the pump before you handle it, stay out of standing water that is near outlets, a panel or appliances, and hire a licensed electrician or plumber for wiring and plumbing work. Check local codes and permit rules. This safety note is ours, not from a source.

Common questions

What does a sump pump do?

It pumps water out of a pit in your basement or crawl space and away from your foundation. NDSU Extension calls it the first line of defense against water in the basement for many homeowners.

How long do sump pumps last?

Boston's city estimate is a useful life of 7 to 10 years for a sump pump installation.

Do I need a backup sump pump?

Not necessarily. Ann Arbor, Michigan says it depends on your situation and that backup systems add expense, maintenance and complexity. Our checker walks through the risk factors it lists.

Can I install a sump pump myself?

Local rules differ. Boston says a sump pump and basin should be installed by a licensed professional and needs a plumbing permit. New Jersey allows homeowners to do the work on their own single-family home with a permit when the pump connects to existing plumbing. Check your local building department.

Related guides

Sources
  1. NDSU Agriculture and Extension: Sump Pumps
  2. City of Boston: Flood Retrofits (cost and useful-life figures are the city's estimates)
  3. City of Ann Arbor, Michigan: Sump Pump Backup Options (PDF)
  4. Consumer Reports: Sump Pump Backup System Buying Guide (updated March 21, 2025)

Free printable: Sump Pump Fall Check

A ten-minute test before the wet season. Download the one-page PDF now, or get it by email along with a short series of five helpful emails.

Download the PDF



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