If there’s one thing you should know about Vancouver's drinking water, it’s that it tastes incredible! But to keep our water clean and safe, some homes and businesses need backflow valves.
A backflow valve, also known as a backflow preventer, is a device installed on water pipes where there is a cross connection to keep water flowing in one direction. It is meant to protect drinking water from contaminants on the downstream side from flowing back into the drinking water.
How does backflow happen?
Backflow can happen for many reasons, but more often than not, it is caused by common issues like a break in a water main, plumbing maintenance, or sprinkler system malfunctions, to name a few. Whatever the cause of the issue, there is a change in pressure in the water line that causes a backward suction that pulls the outflowing water back into the drinking water. This is called back-siphonage.
Backflow can introduce contamination - due to unclean water - into a building’s drinking water and, even worse, the public drinking supply.
This is why devices like backflow valves are incredibly important for preventing backflow and keeping drinking water safe.
Does my building have a backflow valve?
Not every home or building has a testable backflow valve. You’re unlikely to have a testable backflow valve in a single-family residential property if you don’t have any irrigation system or fire sprinklers. However, backflow valves are required in:
commercial properties
highrise residential buildings
Industrial buildings
buildings with fire sprinkler systems
properties and homes with irrigation systems
Buildings with special water-using equipment like boilers, pool equipment, and water filters
Overall, the requirement for a backflow valve depends on the building type, water system complexity, and local regulations.
Signs your backflow preventer needs attention
If your building has a backflow valve, you will have to have it tested annually to ensure that it is functioning correctly. However, if you are between your annual backflow check-up, here are some warning signs that you should keep in mind that can signal you need your backflow assembly looked at:
Physical signs:
Change in water pressure throughout the building
Strange, hammering or whistling sounds from the valve
Leaks or wetness around the valve area
Visible damage or corrosion on the valve
Unusual taste or odor in your drinking water
Performance signs to watch for:
Irregular water flow
Inconsistent pressure between floors
Dripping or consistent wetness from the valves
Failed pressure gauge readings
Backflow valve not maintaining pressure
What to do if your backflow valve fails
In British Columbia, regular prevention testing is required to ensure the safety of the public drinking supply. However, if you notice signs of malfunction, you should seek professional assistance.
Although a malfunctioning backflow valve is a serious issue, it can be fixed. If you can reach the connection, the first step is to shut off the valve immediately. The second step is to call a professional—repairing a leaking backflow assembly is not a DIY project.
As you wait for professional assistance, be sure to:
Document how and when you first noticed the failure
Take any photos of the leakage or issues
Note any unusual water behavior
Keep the area accessible
Why do you need a professional to fix your backflow valve?
Hiring a certified backflow prevention assembly tester will save you time and frustration over fixing your backflow preventer yourself. Certified testers, like SMT Backflow, have a clear understanding of Bylaws and individual community requirements that adhere to building code standards.
They will be able to properly assess and repair any issues you may have with your backflow assembly and facilitate any reporting that is required in your municipality.
Maintaining a healthy water supply
Your backflow value serves an important purpose in defending against water contamination. And while it might seem like a simple component that is easy to overlook, it plays a big part in protecting water quality.
Regular testing and upkeep of your backflow valve is more than just checking a box for compliance. It’s about ensuring the continued safety of your property and the public water supply. Regular testing is not only required annually but can also prevent costly repairs and future headaches.
If you need help with your backflow valve, or to schedule your annual testing, call or email us to book your appointment.
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