Can You Dump Water in Your Sump Pump: What the Pros Say

To dump water or to not dump water in your sump pump—that’s the question

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Photo: Stefania Pelfini, La Waziya Photography / Moment / Getty Images
Little girl wearing yellow rain boots
Photo: Stefania Pelfini, La Waziya Photography / Moment / Getty Images
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When it comes to safeguarding your home from water damage, a sump pump is key. A sump pump is a silent hero, hidden in your basement, tirelessly guarding against floods and other disasters. Read on to unravel the mysteries of sump pumps, from their purpose to their inner workings, and dive into essential maintenance tips that keep them in top shape, including whether it's okay to dump water into them. 

How Does a Sump Pump Work?

Backup Sump Pump
Photo: IcemanJ / Adobe Stock

A sump pump gives homeowners a reliable defense against basement flooding. It has a pit or sump basin, typically located in the lowest part of your basement or crawl space, and an electric pump. 

When excess water accumulates in the pit, either due to heavy rain or rising groundwater, a float switch is triggered. This switch activates the pump, quickly discharging the water from your home through a pipe or hose. 

By swiftly removing excess water, sump pumps prevent it from infiltrating your basement, which protects your property from costly water damage. Their automatic operation makes them a dependable and essential tool in maintaining a dry and secure home.

Sump Pump Maintenance 

Neglected sump pumps can lead to failures, which is a bummer if this happens when you need it most. Regular maintenance ensures your sump pump will function and shield your home against water damage. Remember to disconnect the power source while cleaning for safety. 

Taking care of your sump pump doesn’t have to be a burden if you take the following maintenance steps:

  • Regularly test the pump by pouring water into the sump pit to see if it activates

  • Clear any dirt, stones, or debris from the sump pit that might affect the pump's operation

  • Check the power source and ensure the pump is plugged in and operational

  • Inspect and clean the float switch to guarantee it moves freely and activates the pump

  • Lubricate the pump bearings as recommended by the manufacturer

  • Wipe down the pump housing to remove any buildup that could affect it

  • Make sure the discharge pipe is free of obstructions and directs water away from your home

  • Test the backup power source, such as a battery or generator, if your pump has one

  • Consider installing a backup pump for protection during power outages or pump failures

Dumping Water in Your Sump Pump 

Sump pumps are designed to handle natural groundwater, rainwater, and occasional excess moisture—not a deliberate influx of water. Introducing large volumes of water can overwhelm the pump and potentially shorten its lifespan. So, pouring water into the sump pit may disrupt the pump's operation, causing it to cycle unnecessarily. If you’re unsure if your sump pump is working correctly, contact a sump pump repair professional near you before you dump water into it. 

However, there are a few times when you can pour water into your sump pump—gently. 

Adding Water To Test the Sump Pump

Testing a sump pump by very gently adding water is actually a crucial part of regular maintenance. Pouring a controlled amount of water into the sump pit allows you to ensure that the pump functions correctly and activates as expected. This simulation mimics storm conditions and can help you verify that your sump pump is ready to handle excess water during heavy rains or rising groundwater. 

Here are some simple steps for gently adding water to your sump pump:

  1. Fill a container with approximately five gallons of water

  2. Slowly pour the water into the sump pit (the lowest point of the sump pump system)

  3. See if the sump pump activates and efficiently pumps the water away

  4. Watch it to make sure it operates smoothly and effectively

  5. Repeat this test periodically, especially before storms to ensure your pump is ready to work

Dumping liquids other than water into your sump pump is highly discouraged. Introducing other liquids, like chemicals, oils, or sewage, can damage the pump and disrupt its functioning. It may also pose environmental and health hazards. The primary purpose of a sump pump is to protect your home from potential flooding, not to manage waste or contaminants. 

How Sump Pump Drainage Works 

A sump pump drains any accumulated water from its sump pit. Once the sump pump activates, it propels the water through a discharge pipe. This pipe is typically directed away from your home, leading the water to a designated drainage area, such as a storm sewer or a dry well. 

Forcefully expelling the water through the discharge pipe helps prevent it from seeping back into your basement. If you notice water pooling right outside of the pipe or your basement, it might be time to check if your sump pump is draining correctly.

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