Water pressure issues are among the most common causes of irrigation problems in Calgary — and they're often misdiagnosed. A system that looks like it has “broken heads” may actually have pressure that is too high (misting heads, foggy spray) or too low (heads not popping up, poor throw distance). This guide helps Calgary homeowners identify and resolve pressure problems.
Calgary Irrigation Pressure Diagnosis
| Symptom | Likely Cause | Fix |
|---|---|---|
| Heads “misting” or producing fog instead of spray | Pressure TOO HIGH (above 60 PSI) — common in Calgary where city pressure can reach 80+ PSI | Install pressure regulator; use SAM/PRS heads |
| Heads barely pop up or don't extend fully | Pressure TOO LOW — backflow not fully open, or a leak elsewhere in the zone | Check backflow; find and repair leak |
| Rotor heads oscillating slowly or not rotating | Pressure too low for rotors (need 30-45 PSI minimum) | Pressure test and backflow adjustment; add pressure booster if needed |
| First zone fine; subsequent zones weak | Too many heads per zone — exceeds flow rate of that zone valve | Redesign: split overloaded zone into two zones |
Calgary City Water Pressure — What to Expect
City of Calgary water pressure varies by neighbourhood but is typically 55-80 PSI at the meter. Irrigation heads are designed for 30-50 PSI at the head. Without pressure regulation, high-pressure Calgary water can reduce head lifespan by 30-50%. Hunter Pro-Spray and Rain Bird 1800 Series heads with built-in pressure regulation (SAM/PRS) are the correct choice for Calgary's high-pressure zones. J.G. Irrigation installs pressure-regulated heads on all new systems. Call 587-433-4795 for a pressure diagnosis.
Calgary Irrigation Pressure Problems — Professional Diagnosis
J.G. Irrigation — Calgary Irrigation Services
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