Sprinkler backflow preventer Calgary: Testing, Repair, and Replacement

Every Calgary irrigation system connected to municipal water requires a backflow preventer by Alberta plumbing code. J.G. Irrigation installs, inspects, repairs, and replaces backflow preventers on all residential and commercial Calgary irrigation systems. IA-certified technicians. All backflow preventer work compliant with Alberta plumbing code and City of Calgary water use bylaws.

What Is a Backflow Preventer and Why Is It Required?

A backflow preventer is a one-way valve assembly installed between your home's water supply and the irrigation system. Its function: if water pressure in the municipal supply drops suddenly (water main break, fire hydrant use nearby), water in your irrigation lines cannot be siphoned backward into your home's potable water supply. Without a backflow preventer, lawn water, pesticide residue, and soil contamination can enter your drinking water. Alberta requires backflow preventers on all irrigation connections — any irrigation system without one is non-compliant.

Types of Backflow Preventers for Calgary Irrigation

Backflow Preventer Repair vs Replacement

Most backflow preventer failures are repairable: a worn poppet seat, cracked bonnet, or failed spring can be replaced with a rebuild kit for $80-$150 vs full replacement. J.G. Irrigation diagnoses at the flat $90 service call and recommends repair when the assembly body is sound — replacement when the body is cracked (common from missed blowout freeze damage) or corroded beyond rebuild. We carry rebuild kits for all major Watts, Febco, and Wilkins backflow preventer assemblies.

Backflow Preventer Freeze Damage

The most common backflow preventer failure in Calgary is freeze cracking — the assembly holds water that freezes and cracks the brass body when blowout is skipped or inadequate. Cracked backflow preventers must be replaced entirely ($180-$350 parts and labour). If your system was not properly blown out last fall, have the backflow preventer inspected before spring startup — a crack discovered in spring avoids a flooded mechanical room from a failed preventer under full water pressure.

Backflow Preventer Service Calgary — Inspection, Repair, Replacement
IA-Certified • Alberta Code Compliant • All Calgary Addresses

☎ 587-433-4795  Repair Service →