Commercial irrigation winterization and spring start-up. Both ends of the season, one agreement.
Every autumn the water in a commercial irrigation system has to come out before the ground freezes. Every spring it has to go back in without turning winter damage into a season-long leak.
SMART does both under a seasonal service agreement: certified in-house crews, a written record after each visit and one schedule for commercial properties across Ontario.
What commercial irrigation winterization involves.
Winterizing a commercial sprinkler system means getting the water out of every pipe, valve and head before it can freeze, then shutting the system down in a way that is recorded. On a commercial property that is a sequence, not a single step.
Compressed-air blowout
Water is isolated at each point of connection and a tow-behind compressor pushes air through the mainline and every lateral, zone by zone. Air volume is matched to the pipe and pressure is kept below what fittings and heads are rated for. Each zone runs until it blows dry; zones with low points or long laterals are cycled again.
Controller shutdown
The controller is set so no zone can open over winter, with the program preserved rather than erased. Sensors, master valves and any monitoring hardware are set for the off-season, and above-ground components at the point of connection are drained or insulated as the site requires.
Documented zone-by-zone check
Every zone is logged as blown out. Anything found along the way, such as a head damaged by a mower, a valve slow to close or a wet area over a lateral, is recorded for spring. The record goes to the property manager, so winterization closes with a report, not just an invoice.
Why commercial sites are different.
The scale changes the job.
Multiple points of connection
A plaza, campus or industrial site may be fed from several water sources, each with its own isolation and its own blowout sequence. Missing one leaves a pressurized section waiting for the first hard freeze.
Large mainlines
Long runs of large-diameter pipe hold far more water than the laterals and need a compressor sized to move it. An undersized compressor leaves water sitting in low points, which is exactly where mainlines split.
Other contractors' schedules
Landscape crews are doing fall cleanup, snow contractors are staging equipment, and planting or paving may still be underway. We set the date with your site team, after the landscape no longer needs water and before the first sustained freeze.
Liability for frozen lines
When a line freezes on a commercial property, the cost is rarely the pipe. It is the excavation through hardscape, the water lost before anyone notices in spring, and the question of who signed off on the shutdown. A documented winterization answers that question.
Spring start-up and the inspection report.
Start-up is where winter shows itself. We bring the system back online in stages: mainlines are filled and pressurized slowly so a crack announces itself as a pressure drop rather than a washout, then each zone is run and walked. Heads are checked for coverage and alignment, valves for a clean open and close, wiring for faults, and the controller is programmed for spring conditions.
The visit closes with an inspection report: zone by zone, what works, what was adjusted on the spot and what needs a repair quote, separated into urgent items and work that can wait for the budget cycle. Where flow monitoring is installed, start-up is also when each zone's baseline flow is confirmed, so a change later in the season stands out. See how that works under irrigation management with flow monitoring.
Two visits a year, one agreement.
Winterization and start-up are the two visits every commercial irrigation system needs, so we sell them together. A seasonal service agreement fixes both dates in advance, keeps the same crew on your property at both ends of the season and gives you one document trail from shutdown to start-up.
What is included
- Fall winterization: compressed-air blowout of every zone, controller shutdown and a written winterization record.
- Spring start-up: staged pressurization, zone-by-zone testing, controller programming and the inspection report.
- Scheduling coordinated with your landscape and site contractors, with dates confirmed in writing.
- One point of contact for the property, or for the portfolio, with every site on the same calendar.
How it fits with our other programmes
The seasonal agreement is the base of our commercial irrigation maintenance and repair programme; in-season inspections are added for properties that want the system checked through the summer.
Properties on Irrigation Management keep the same two visits and add flow monitoring between them: 24/7 automated alerts where monitoring is installed, irrigation flow alarms on monitored sites responded to within 48 hours including weekends, and remote shutoff where installed.
Timing for Ontario.
October to mid or late November
The winterization window typically opens in October, once the landscape no longer needs water, and runs until sustained freezing sets in, usually by mid to late November in southern Ontario and earlier further north. The target is the first hard, multi-night freeze, not the first frost.
Late April into May
Start-up typically runs from late April into May, after the last hard frost, once the ground has thawed enough that a pressurized line is no longer at risk.
These are typical windows, not dates. Weather sets the schedule each year, and agreement properties are scheduled first.
Commercial irrigation winterization — what to expect.
When should a commercial sprinkler system be winterized in Ontario?
Typically between early October and mid-November, after the landscape stops needing water and before the first sustained freeze. The risk is a hard freeze lasting several nights, not the first light frost.
What does a blowout cost for a commercial property?
We do not publish a flat price because no two commercial sites take the same time. The main drivers are the number of zones and controllers, the number of points of connection, the size and length of the mainline, site access and scheduling constraints, and whether spring start-up is bundled under a seasonal agreement. A short site visit sets the scope and the quote is in writing. Request a seasonal quote.
Is commercial sprinkler winterization the same as irrigation winterization?
Yes. The terms are used interchangeably. Whatever it is called, the service has three parts: a compressed-air blowout of every zone, a controller shutdown that keeps the program, and a written record of what was done and what was found.
What happens if a commercial irrigation system is not winterized?
Water left in the pipes freezes and expands. The usual results are cracked laterals, split mainlines, burst valves and damaged heads, and most of it stays hidden until the system is pressurized in spring. On a commercial site the repair often means excavating through pavement or finished landscape.
Does spring start-up include repairs?
Start-up includes the testing, the adjustments made on the spot and the inspection report. Repairs the report identifies are quoted before any work begins, separated into items that need attention now and items that can wait, so you approve the work with the findings in front of you.
Can you winterize a system another contractor installed or maintained?
Yes, and most of the systems we service were installed by someone else. We record the system as we find it, winterize it and bring it under the seasonal agreement from there. See how we schedule commercial irrigation in Toronto and commercial irrigation in Mississauga.
Put both ends of the season on one agreement.
Tell us about the property, or the portfolio, and we will set the fall and spring dates with you.
Service team
Irrigation across Ontario. Indoor water management across Ontario, British Columbia and Quebec.