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Commercial- Backflow Prevention Device Replacement & Installation

The key to keep your business premises’ plumbing system work properly is preventative maintenance and monitoring. It’s important that every commercial business owner in Toronto needs to hire the commercial plumbing expert to inspect the system and be able to identify common devices and assemblies in order to precisely note them in the commercial property inspection report.

At Everest Drain & Plumbing, we take pride in the fact that we focus almost 100% on the backflow prevention service and repairs and installation.

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Backflow Prevention for Commercial Business

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From hotels to restaurants, colleges to schools, Everest Plumbing serves all sizes and types of commercial businesses with high peak hot water demands. We have the necessary equipment and training to supply and install commercial-grade water heating systems, which can easily cater for high demand applications.

We are a leading commercial plumbing service provider in Toronto. We specialize in the testing, repairing, and installation of plumbing systems. We provide highly qualified and experienced technicians, ensuring that your assets are protected and that your business can continue operating.

If you are unsure whether your business requires the repair and installation of a backflow prevention device then please give us a call.

What is Backflow?
Backflow is the reversal of the flow of water, or a mixture of water and pollutants, into the distribution pipes of your potable water system. It happens when a water system is reversed due to a pressure drop. When there is a pressure drop in the pipe it may allow contaminated water from your property to be drawn back into the main water system.

What Causes Backflow?

Any organization that uses water in its day-to-day business including hotels, restaurants, hospitals, universities, and laboratories is delivered through a water distribution system. Water distribution systems are designed so that water flows in only one direction. However, it is possible for the system of delivery to breakdown or develops complications that stop the water from flowing in its intended direction. When this occurs, water ends up flowing in the opposite direction.
Listed below are the major causes of backflow in commercial properties.


  • Back-siphonage
    This arises when the pressure in the water supply piping becomes significantly lower than the external pressure (or that in the plumbing system). Back-siphonage typically occurs in toilets and sinks. Unless preventive measures are applied, this is very likely to occur.
  • Back Pressure
    Back pressure is the term used for the pressure that pushes gas or water in the ‘wrong’ direction. This most often happens when heaters are not provided with efficient vents or outlets. It causes the pressure inside to rise at the time when the water is being heated up.
  • Sewerage pipe damage
    The sewerage pipes are carrying the wastewater from your property to the local water system. Because everything is subject to wear and tear, these pipes suffer damage over time. Once they do, it will cause backflow. The signs are very obvious, so it is possible to take action right away. Foul smell and leaks from your drains are the primary indicators of sewerage pipes damage.
  • Local source damage
    There are also some rare occasions where the cause of the problem cannot be detected inside your property or business. Sometimes, there is nothing wrong with your plumbing system. The issues lie in with the city or local sanitation district, and a backup within the system may have caused the backflow into your business.

How to  Prevent Backflow?
Businesses that present a potential backflow hazard are required to install the appropriate backflow prevention device and have it tested annually. Most commercial businesses like hotels, restaurants, schools, and medical laboratories will require backflow prevention and containment devices to protect the water supply from potential contamination. Backflow can be prevented with backflow prevention devices and can be installed in any number of places. There are larger backflow prevention devices available in the markets that prevent wastewater from the property from entering the city’s water supply. A correctly selected backflow prevention device will eliminate any risk of contamination of the drinking water supply.

Backflow Prevention Regulations
The water supply by law mandates that all commercial properties in Toronto should have backflow prevention devices. Contact us today for detailed information on various situations whereby your commercial properties would be required to have a backflow prevention device installed.

Backflow Prevention Devices for Commercial Business

Backflow prevention devices help to ensure that the drinking water is protected against contaminants and are installed where there is a risk of contaminated fluids entering the water supply pipes.

There are two main categories of backflow prevention devices for commercial businesses and properties.
Testable backflow prevention assemblies are needed for use at a service connection, but may also be used for internal protection.

  • Reduced Pressure Principle Backflow Assemblie
  • Double Check Valve Assemblies
  • Reduced Pressure Principle Backflow Assemblie
  • Pressure Vacuum Breakers

Non-testable backflow devices are usually used for internal protection, within the consumer’s portable system. If these types of valves fail, you are still facilitated by the testable assembly installed at the service connection.

Backflow Prevention Devices Testing Repair

Testing is necessary after the installation of a backflow prevention device. It is important that your backflow device is tested every year at your business. Our team can perform your yearly testing, lodge your results and provide you with the necessary documentation to ensure that you are meeting all your legal requirements.


Call Everest Drain & Plumbing for a quote

(416) Everest (383-7378)

FAQ’s about Backflow Prevention

  • 1. Must my business have backflow prevention?

    All commercial properties and businesses are required to have backflow prevention at the water service system. Common examples are manufacturing and processing plants, medical facilities, laboratories (including school chemistry and biology labs), and buildings that have boilers, fire sprinkler systems, and irrigation systems. Call your local water supplier to confirm whether or not backflow prevention is required at your business.

  • 2. What kind of backflow prevention is required at my business?

    First, ask a licensed backflow plumber to inspect your property and what appropriate backflow prevention device is required. There are a number of different types of backflow prevention devices available. The type of device required will depend on the risk rating of the property with the possible hazard. The licensed backflow plumber near your area will be able to provide you with all the relevant information.

  • 3. Must I have my backflow prevention assembly inspected?

    Yes. Backflow preventers have internal parts that are subject to wear and tear, so they must be tested periodically by professional experts to ensure they are working properly. If the tester finds the assembly is not working, you must arrange to have it repaired and tested again.

  • 4. Who is responsible for the testing and maintenance of the backflow preventers?

    It is the sole responsibility of the customer to ensure the appropriate backflow prevention assembly is functioning all the time.

  • 5. How much will a backflow test cost?

    The cost of having a device tested differs among testers. It is also dependent on several factors including the size of the device, where the device is located, the type of device, service charge, etc.

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