Irrigation & Sprinkler Systems in Ontario

Almost always where the system connects to mains/drinking water — a backflow preventer stops irrigation water (and any fertiliser or contaminants) siphoning back into the supply. Many areas legally require one, and some require it to be tested by a certified tester periodically. Confirm the local rule; it's a safety and compliance item, not an optional extra.

Repairs are usually modest: a broken sprinkler head, a leaking valve, a controller reset, or a winter-damaged line. Costs rise if a mainline leak needs digging or the controller/valve manifold needs replacing. A seasonal check-up that catches small leaks early is cheaper than the water wasted by an unnoticed one.

In any climate that freezes, yes — water left in the pipes expands when it freezes and cracks lines, heads and valves, turning a cheap seasonal blow-out into an expensive spring repair. Warm, frost-free climates skip this but still benefit from an annual service. Ask whether winterization is included or a separate visit.

No backflow device where it's required, no zone-by-zone quote, no as-built diagram at handover, ignoring local water-restriction rules, and a design that waters everything on one zone regardless of plant needs. An installer who skips the backflow/compliance question is cutting a corner that can be illegal and unsafe.

In-ground systems are priced per zone (a valve-controlled area) plus the controller, backflow device and any pump. Total cost scales with yard size, number of zones, and whether you use sprinkler heads, drip lines, or both. A small garden with a few zones is a fraction of a large multi-zone lawn-and-bed system.

In-ground systems commonly run CAD 600-1,100 per zone, with a typical yard installed at CAD 3,000-6,000. Annual blow-out winterization is a small recurring cost that prevents expensive freeze damage.