Sump pump failure: warning signs, backup options and insurance

Sump pump failure is a common cause of basement flooding in the Lehigh Valley, especially during spring thaws and heavy storms. The pump's job is simple: collect groundwater in a pit below the basement floor and push it outside before it rises. When the pump stops, that water has nowhere to go but onto your floor. This guide covers the warning signs, how to test your pump, backup options, and what homeowners insurance usually does and doesn't pay for.

1. Why sump pumps fail

Most failures come down to a few things:

• Power loss. The heaviest rain often comes with storms that knock out power, which is exactly when a plug-in pump stops.
• A stuck float switch. The float tells the pump when to turn on. If it hangs up on the side of the pit, a cord or debris, the pump never starts.
• Clogs. Dirt, gravel and debris in the pit can block the intake.
• A frozen or blocked discharge line. If the pipe outside is frozen, crushed or clogged, the pump runs but the water has nowhere to go.
• Age and wear. Farmers Insurance notes that many sump pumps last 7 to 10 years, depending on how hard they work and how well they're maintained.
• Too small for the job. A pump that keeps up with a normal spring can fall behind in a heavy, long storm.

2. Warning signs your sump pump is failing

Watch and listen for these:

• The pump doesn't turn on when water rises in the pit.
• It runs but the water level doesn't drop.
• It runs constantly, or turns on and off over and over.
• Grinding, rattling or other new noises.
• Visible rust or corrosion, or water stains around the pit.
• A musty smell or damp spots in the basement after rain.

Any of these is worth a call to a plumber before the next big storm, not after it.

3. How to test your sump pump

Farmers Insurance recommends testing every few months, before major storms, and when you buy a home that has a sump pump. The test takes five minutes:

1. Make sure the pump is plugged in.
2. Pour a bucket of water slowly into the pit.
3. Watch the float rise and the pump kick on.
4. Make sure the water level drops and the pump shuts off on its own.
5. Go outside and confirm water is coming out of the discharge pipe.

While you're there, clear debris out of the pit and make sure the float moves freely. In the fall, check that the outside discharge line is clear and directs water away from the house, not back toward the foundation.

4. Backup options when the power goes out

FEMA's flood protection guidance recommends choosing a battery-operated sump pump in case the power goes out. The Federal Alliance for Safe Homes (FLASH) also points to a generator as a way to keep a pump running for an extended outage. The common setups:

• Battery backup pump. A second pump in the same pit that runs on a battery when the main pump loses power or can't keep up. Test it and replace the battery on the manufacturer's schedule.
• Generator. A portable or standby generator can run the main pump through a long outage. Never run a portable generator indoors or in an attached garage.
• Water-powered backup. Some homes on public water use a backup that runs on household water pressure instead of electricity. A plumber can tell you whether your water pressure and local code allow one.
• High-water alarm. A simple alarm in the pit warns you before the water reaches the floor.

One thing not to do: don't send sump water into a floor drain or laundry sink that connects to the sanitary sewer. Local sewer rules often prohibit it. Bethlehem Township and Quakertown Borough, for example, both ban it by ordinance, because groundwater overloads the sewer system. It should go outside or to the storm sewer where your municipality allows.

5. Does homeowners insurance cover sump pump failure and basement flooding?

Often, not on a standard policy alone. Standard homeowners policies usually exclude water that backs up through sewers or drains or overflows from a sump. To be covered, you usually need a separate endorsement, often called "water backup and sump discharge or overflow" coverage. The Massachusetts Division of Insurance puts it plainly: standard homeowners, renters and condo policies do not cover water damage from the failure of a sump pump. The same is usually true in Pennsylvania, but carriers differ, so check your own policy.

Some things to know about that endorsement:

• It usually has its own, lower limit, separate from the rest of your policy, and often its own deductible.
• It usually pays for the water damage, not the pump itself. Normal wear and tear on a pump is typically not covered.
• Limits are often small compared with the cost of a finished basement. Look at your declarations page to see if you have it and how much.

What about flood insurance? Flood insurance through the National Flood Insurance Program (NFIP) is a separate policy. The Massachusetts Division of Insurance notes that NFIP policies do not cover sump pump failure itself, though they can cover sewer backup when a general flood in the area is the cause. FloodSmart, the NFIP's site, says basement coverage is limited: equipment like furnaces, water heaters and sump pumps is covered if installed and connected to power, but finished basements and most belongings down there are not.

For the bigger picture, read what homeowners insurance usually covers for water damage in Pennsylvania.

6. If your basement floods anyway

Safety first: don't walk into water that may be in contact with electricity. Shut power to the area if you can do it from a dry spot. Then document everything before you move or throw anything out: the water line on the walls, the pit, the pump, and damaged items. Keep the failed pump. An adjuster may want to see it.

Get drying started quickly. Wet drywall, carpet and framing that sit for days can lead to mold. Our guide to what to do in the first hour after a basement floods walks through the order, and how to file a water damage claim step by step covers the claim side.

This article explains how claims generally work. It is not legal advice, and every policy is different. Read your declarations page and endorsements, or ask your agent. We can't promise a claim outcome. We make sure your claim is documented right.

Common questions