What backflow is
Normally water flows from the supply to your fixtures. If pressure drops, as in a main break or heavy firefighting demand, water can be drawn backward. If a hose is sitting in a bucket of chemicals or a boiler loop is connected to the supply, contaminants can be pulled into drinking water.
Backflow devices create a barrier that prevents this. Codes require them wherever a hazard exists.
Where they are required
- Main water entry for some building types
- Fire sprinkler connections
- Irrigation systems
- Boiler and hydronic heating fill lines
- Commercial kitchens and dish machines
- Laboratories and healthcare equipment
- Carbonated beverage and coffee systems
- Hose bibs and wash stations
Types of devices
Devices range from simple vacuum breakers and air gaps to reduced pressure principle assemblies for higher hazards. The right type depends on the level of hazard. Our plumbers choose and install the appropriate device to the plumbing code.
Larger devices need space, drainage for relief discharge and protection from freezing. In Alberta, outdoor installations need heated enclosures or placement inside.
Testing and records
Many devices must be tested after installation and then regularly. Testing is done by qualified testers, and the municipality or water utility often asks for records. We include initial testing in our work and can arrange the annual follow-up through our plumbing maintenance service.
Missed testing is a common compliance gap. A building that has changed tenants may have devices no one knows about. We can survey your building, list the devices and set up a schedule.
In renovations, adding a coffee machine, dishwasher or irrigation connection can trigger new backflow needs. Tell us what equipment is coming. Because our plumbers also work with our mechanical crew, heating system fill lines and equipment connections are handled with the right protection.