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Sump Pump vs Backwater Valve


Shawn MgGirr

Shawn MgGirr

Shawn started forming, pouring and waterproofing foundations over 30 years ago. Learn More About Shawn MgGirr

In the quest to keep basements dry in Toronto, homeowners are often faced with a choice between two common waterproofing options: sump pumps and backwater valves. At Aquatech Waterproofing, we understand that each home’s needs are unique, and we’re here to help you make the best choice for safeguarding your property.

Understanding Sump Pumps

A sump pump system is designed to collect groundwater through a sump basin and pump it away from your home, effectively keeping your basement dry. It’s particularly useful in areas prone to basement flooding or for homes with a history of groundwater issues.


– Actively removes water from your basement.

– Ideal for homes located in high-water table areas.

– Can handle large volumes of water, especially during heavy rains or snow melts.


– Requires electricity to operate (although Aquatech offers battery backup systems).

– Regular maintenance is needed to ensure functionality.

The Role of Backwater Valves

Unlike sump pumps, backwater valves are passive devices installed in the sewer line to prevent sewage from backing up into your home during a municipal sewer overload, which can happen during significant weather events.


– Provides a one-way gate to prevent sewer water from entering your home.

– Low maintenance with no moving parts to fail during operation.

– Mandatory in some areas and may have rebate programs available.


– Does not manage groundwater or rainwater seepage.

– Installation can be disruptive since it requires access to the main sewer line.

Make the Right Choice for Your Home

The decision to install a sump pump or a backwater valve (or both) depends on various factors:

  1. Assess the Water Source: If your home’s issue is primarily with groundwater, a sump pump is likely necessary. If the problem is the surging of sewer systems during heavy rains, a backwater valve is the right choice.
  2. Consider Your Location: Homes in low-lying areas or with poor natural drainage will benefit from a sump pump, while homes connected to city sewer systems might need a backwater valve to protect against municipal sewer backup.
  3. Evaluate the Risk of Power Outages: In areas where power outages are common, a sump pump with a battery backup or a backup generator might be required, whereas backwater valves do not require power to function.

How Much Does It Cost To Install A Sump Pump VS Backwater Valve

Installation costs for sump pumps start at $1000-$3000, while backwater valve installations range from $800-$2500 depending on the size of the job. It’s a small price to pay for the peace of mind and protection they provide.

Aquatech Waterproofing’s Comprehensive Solutions! Contact Us Today!

With a wide range of services, we offer both sump pump installations complete with battery backup systems and backwater valve installations. Our expertise allows us to provide custom quotations and solutions tailored to your home’s specific requirements – whether you’re combating interior moisture or defending against city sewer surges.


At Aquatech Waterproofing, we understand that a dry basement is integral to a safe and comfortable home. That’s why we are dedicated to helping Toronto residents understand and choose between a sump pump and a backwater valve. 

To find out which system—or combination of systems—is right for you, contact Aquatech Waterproofing. Let’s ensure that the next time the clouds gather, your basement remains comfortably dry.