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A backwater valve or backflow preventer is installed below your basement floor on the main lateral drain line to prevent sewage or storm water from backing up in plumbing fixtures or drainage system. It senses a reverse flow and completely closes a gate to stop it from backing up.
Backwater Valve – Keeping You Protected. With homeowners in Canada using their basements for much more than storage, it is more important than ever to protect the extended living space from moisture and water infiltration. A key component to making sure your basement stays dry is to install a backwater valve. The work is quite extensive and will require a waterproofing professional. Royal Work Corp. has technicians trained in the proper installation and maintenance of backwater valves and are ready to help.
Royal Work Corp has over 15 years of experience dealing with all types of basement waterproofing and plumbing issues. A backflow valve, also known as a sewer backup valve, can be installed on your sewer line to prevent water and sewage from flowing in the wrong direction—keeping them moving away from your home. This valve goes by several different names. If the city’s sewer pipes become overwhelmed by a heavy rainstorm, sewage and water can flow back into your home. However, as long as your sewer system is protected by an automatic backwater valve, this cannot happen.
Some towns mandate the installation of backflow prevention valves according to backwater valve regulations, while others simply recommend them. These valves can either be installed in new homes during construction or added to existing ones. Installing a sewer valve during the original construction phase is significantly more cost-effective. Homes with basements or those situated less than one foot above street level are at greater risk of ground-level flooding. According to the National Plumbing Code, a backwater valve is required if any fixtures in a new residence are positioned lower than street level.
Typical backwater valves consist of a 4″ ABS plastic pipe with openings at both ends for water and waste inlet and outlet, a gate with flotation devices on either side, and a clear top with an opening for visual inspection.
A backwater valve is the last line of defense from allowing water to enter your home if your sewers are backing up. Every home drainage system is different, so it is important to discuss your plans for changing your current system. Once you’ve decided to proceed with the installation of a backwater valve, our technician will break through the basement concrete floor and dig down to the sewer lateral. This is the pipe that sinks, tubs and toilet wastewater flows through to the sewer. A short piece of lateral is cut out, the backwater valve is then lowered and secured. It will be necessary to disconnect the weeping tile from the sanitary sewer and possibly install a sump pit and pump. New concrete is poured to fill in the basement floor.
The back water valve is designed to close if water ever starts to back up. There are two floatation devices on either side of a gate that will push it closed to prevent sewer water from re-entering the home. When the water pressure is released, the gate will drop back down flat and water will smoothly flow out again. The clear top on the valve allows regular checks to make sure it isn’t clogged. The top should be tightly secured and regular inspection by a plumber is also recommended.
Another area of concern may come from gutter downspouts that are connected to your sewer lateral. Disconnecting and extending them two meters away from the foundation will help prevent excess water from backing up during rainstorms..
Owners can avoid the following basement problems by insuring everything is working correctly. A backwater valves play a crucial role in protecting your basement from flooding..
While there is significant work and expense required to install a backwater valve, the risk of basement flooding and sewer backup will be greatly reduced. The City of Toronto, Halton Region, and Peel Region all offer subsidy programs to help offset the expense.
Below are some details related to eligibility:
The City of Toronto offers homeowners a financial subsidy of up to $3,400 per property to reduce the risk of basement flooding. Owners are required to have a Toronto-licensed plumbing contractor perform an assessment and installation of flood protection devices such as backwater valve, sump pump and pipe severance from the external weeping tile or storm sewer connection.
The Halton Region, including the cities of Burlington, Oakville and Milton, is providing a one-time subsidy to homeowners for flood prevention measures totaling a maximum of $2,725. Reimbursement for materials, labour, permit and taxes for the installation of a backwater valve and disconnecting downspouts and weeping tiles from the sanitary sewer.
The Peel Region, including Mississauga, has a rebate program that provides $700 to homeowners for the installation of a backwater valve and disconnecting weeping tiles and downspouts from the sanitary sewer.
Refer to City websites for application forms and more specific eligibility requirements.
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