What Happens to a Sump Pump in a Power Outage?

Power outages are inconvenient for several reasons, from spoiled food and lost heating to limited communications and disrupted routines. Furthermore, a power outage renders your sump pump inoperable. This means there’s a high risk of flooding in your basement if you don’t have backup systems in place. 

Learn what happens to a sump pump when the power goes out and the risks it poses to your home. Additionally, we’ll explain how to run a sump pump during a power outage and long-term solutions you can explore to prevent similar issues in the future. 

Risks of an Inoperable Sump Pump in a Power Outage

During a power outage, a sump pump shuts down completely. Since it relies primarily on your home’s electricity to function, any disruption to the power supply causes it to stop working. When this happens, it sets off a domino effect, leading to the following outcomes: 

Water accumulation: When a sump pump stops working, water continues to collect in the sump pit, causing it to fill up fast. 
Basement flooding: As the sump pit fills, the water exceeds the pit’s capacity. Before long, the water begins to spill and flood the basement floor. This flooding can damage appliances and belongings stored in your basement. 
Mold growth: If the water is left to stand, mold and mildew can begin to grow within a day or two. While mold may start as an aesthetic concern, it can quickly become a health concern. 
Foundation issues: If power outages or other problems continue to cause the sump pump to stop working, your home’s foundation may weaken over time, undermining its safety and value.

How Long Can a Sump Pump Go Without Power?

Every second counts in a power outage. Without backup solutions, your basement can flood in just a few minutes or hours, depending on the severity of rainfall. However, if you have a battery backup, your sump pump can remain operational for a few hours, depending on the battery life. The following factors may influence how slowly or quickly your basement floods.

Water Table Height

When a sump pump stops working, the water table height determines how quickly your basement floods. Higher water table heights, say during heavy rain or prolonged wet periods, mean faster and more severe flooding. This is because the soil is already saturated, leaving less capacity to absorb additional water. Consequently, the pressure from the saturated soil forces the water into the basement more quickly in the absence of a pumping mechanism. 

Intensity of Rainfall

The higher the rainfall intensity, the faster flooding occurs when a sump pump fails. Without a working pump, water from heavy rain seeps into the basement quickly, flooding it in minutes. In light rain, it may take a few hours for the basement to flood.

Pit Size

The size of the pump pit determines how quickly your basement floods during a power outage. A larger pump pit gives you more time to react, while a smaller one fills more quickly. 

How to Drain a Sump Pump Without Electricity

With the power out and your sump pump inoperable, the last thing you want is water pooling in your basement. One way to prevent this is to manually drain your sump pump. Here are some manual options you can explore: 

Buckets: It’s best to pursue this option if you notice the water levels rising early enough — that way, they may still be manageable. For this method, use a bucket or a large cup to bail out water from the sump pit. Empty the buckets of water you collect away from your house to prevent it from reentering the ground around your foundation.
Hand pumps: For this method, you’ll need a hand pump and a garden hose. Attach your hose to the discharge end of your hand pump. Ensure the other end of the hose is positioned so that water drains a reasonable distance away from your foundation. You can position it to drain into your lawn, a stormwater drainage system or a sloped area. With the hose in place, you can insert the hand pump into the sump pit and begin pumping manually.  
Siphoning: Position the hose so the outlet end is lower than the water level in the sump pit, allowing gravity to siphon the water out. 

As you explore these alternative drainage methods, it’s crucial to maintain electrical safety protocols even when the power is out. Doing so will protect you from electrocution if the power is suddenly restored. 

Battery vs. Water-Powered Backup Systems

While the drainage methods highlighted above are feasible short-term options, there are better and more efficient ways to prepare for a power outage in the long term. You can keep your sump pump running without electricity using either a battery backup or a water-powered backup.

Battery Backup

For most homeowners, a battery-operated backup is the go-to option. It’s affordable, easy to install and simple to maintain. All you need to do is plug in your battery backup — installation doesn’t require hardwiring. With a battery backup in place, you can rest assured it’ll automatically activate in the event of a power outage. As a plus, the system will typically alert you when it switches to the battery backup or if the battery starts running low. This way, you’ll have enough time to handle the situation. 

Although battery backups have several perks, they also have limitations. For example, battery backups may not last long without charging — they may last at least five hours after continuous pumping. This limitation may be a challenge in situations where the power outage lasts longer than the time frame during which the battery is active. Otherwise, it’s a reliable solution for temporary power outages. 

Water-Powered Backup

A water-powered backup is another solution for draining water during a power outage. It functions as a stand-alone system independent of your pump and operates using municipal water pressure, requiring no electricity to be activated. This backup system harnesses water pressure from your water supply to operate your sump pump. Unlike battery backup systems, water-powered backups can run for extended periods as long as the water supply remains uninterrupted. 

The downside of water-powered backups is that they may lead to higher water bills, as the system relies on municipal water pressure.

What to Do if Your Sump Pump Isn’t Working After a Power Outage

After power is restored, your sump pump may or may not operate as usual. In some cases, power outages can cause issues like a tripped breaker, a stuck float switch or mechanical failure, which require troubleshooting.

Here are some steps you can take if your sump pump is not working after a power outage: 

Reset the system: You may need to reset your sump pump after a power outage. One way to do this is to unplug it from the outlet and plug it back in after waiting a few seconds. 
Inspect the breaker: If unplugging and plugging it back in doesn’t reset your sump pump, examine the breaker to see if it tripped — if so, turn it back on. 
Check for debris: You may hear your sump pump beeping after a power outage. This could be due to debris or other foreign objects in the discharge pipe or intake screen, which can cause your sump pump to malfunction. If you notice any buildup, remove it. 

If your sump pump doesn’t work after trying these steps, you may need a professional to troubleshoot and fix the issue. 

Protect Your Home With Enduric Plumbing Services

There is a thin line between a well-maintained basement and a flooded, unusable one, especially during power outages. To keep your basement in the best condition, invest in suitable backup systems and keep your sump pumps in peak condition. 

If your sump pump has developed a fault or is not working as it should, our team at Enduric Plumbing Services Inc. can help. We provide reliable sump pump repair in Greensboro, Winston-Salem, High Point, Kernersville and surrounding areas. Contact us today to learn more about how we can help.