Spring hits and the to-do list for your property gets long fast. HVAC switchover. Exterior walkthroughs. Common area prep. Irrigation startup usually gets delegated somewhere down the chain and checked off without much thought. That’s exactly where the expensive problems begin.
Irrigation leaks don’t announce themselves. There’s no flooded hallway. No tenant complaint. No maintenance request sitting in your inbox Monday morning. The water just goes. Quietly. Consistently. And your consumption numbers climb in a way that’s easy to write off as seasonal variation until the bill arrives and the numbers don’t match any season you’ve seen before.
If you’re responsible for a multi-unit residential building, a commercial property, or a mixed-use portfolio, this is the time of year to look at your irrigation system carefully. Before it runs up a tab you can’t explain to ownership.
You don’t have to be negligent for irrigation leaks to cost you. You just have to be busy, which describes every property manager in April.
Most irrigation systems are set to run between 4 and 6 a.m. The timing makes operational sense. Pressure is stable, evaporation is low, and it doesn’t interfere with tenant activity. It also means nobody on your team is standing outside watching Zone 4 dump water into a mulch bed through a cracked lateral line. The system runs. It shuts off. By the time your maintenance staff does a morning walkthrough, the evidence has either soaked into the ground or dried up in the sun.
Then there’s the delegation problem. You assume the landscaping contractor is monitoring performance. The landscaping contractor assumes someone on your team is reviewing consumption. Nobody is actually watching the system run in real time. That gap is where leaks live, season after season.
A system that ran fine in September is not guaranteed to run fine in May. Winter is hard on irrigation infrastructure, and the failure points are more numerous than most operators realize.
Cracked lateral lines. Underground plastic piping contracts and shifts through freeze-thaw cycles. Cracks don’t always surface visibly. The water soaks into surrounding soil and you get a greener patch or a soft spot in the turf. Easy to miss on a busy property.
Failed zone valves. When a zone valve fails in the open position, that zone runs longer than programmed or continuously. When it fails partially open, it bleeds water slowly at all hours, even when the controller isn’t calling for irrigation. Both scenarios waste significant volume before anyone notices.
Damaged or misaligned heads. Frost heave, snowplow damage, and general wear over winter can knock heads out of position, crack casings, or cause them to fail to retract. One bad head isn’t a crisis. Ten of them across a large property, running undetected since startup, absolutely is.
Controller errors. Power outages over winter can reset controllers or corrupt schedules. A system running on a July frequency in May, when the ground is already saturated from spring rain, is wasting water on a schedule nobody actually set. This is one of the easiest things to fix, and one of the most commonly overlooked.
Backflow preventer failures. Required on most commercial irrigation systems, backflow preventers can weep or drip continuously when they fail. Small volume per event, but it never stops.
If you manage a property with outdoor irrigation and you haven’t done a proper startup inspection yet, here’s what that actually looks like.
Walk every zone while it’s running. Not a quick lap of the property during business hours. Actually activate each zone manually and watch it from start to finish. You’re looking for heads that don’t pop up, spray patterns hitting pavement or building exteriors instead of plant material, wet soil in areas that shouldn’t be wetter than anywhere else, and any moisture around valve boxes.
Do this early in the morning when the ground is drier. Wet spots are much easier to read before the sun has had a chance to dry the surface.
If you’re relying on a landscaping contractor to handle startup, make sure their inspection is a real zone-by-zone walkthrough with someone physically present, not just a confirmation that the controller powered on and the system is running.
Then look at your data. If your building has sub-metering on the irrigation supply line, compare current draw against what the programmed schedule would predict. The math is straightforward. If you’re metering significantly more than the schedule accounts for, something is running when it shouldn’t be.
If you don’t have dedicated irrigation metering, pull your overall building consumption and look at the year-over-year comparison for April and May. A seasonal increase is normal. A seasonal increase that’s materially higher than the same period last year, without a corresponding change in the property, is a signal.
A single zone valve stuck open on a mid-size commercial property can waste tens of thousands of liters in a month. A cracked lateral running undetected through an entire irrigation season compounds that significantly. And with water rates continuing to climb across Canadian municipalities, the dollar impact of that kind of loss is not trivial.
There’s more to it than the water bill. Overwatered turf becomes disease-prone. Saturated soil near your foundation creates structural risk over time. And if your property sits in a municipality with seasonal water restriction bylaws, running an uncontrolled irrigation system during restricted periods can attract fines.
A proper startup inspection costs a fraction of what a bad season of irrigation leaks will cost you. That’s the math ownership cares about.
Irrigation leaks are a spring problem that turns into a summer bill. The system wakes up after a long winter, something is broken, and because nobody’s watching it run at 5 a.m., the problem compounds quietly until it shows up somewhere you can’t ignore.
Walk your zones. Pull your consumption data. Make sure startup is a real inspection, not just a power-on.
The numbers will tell you if something is wrong. The question is whether you’re looking at them early enough to do something about it.
Whether you are looking for a consultation or just have general questions, we’re here to help you.
