Sprinkler Winterizing Service in Brookhaven, Hempstead, and Throughout Suffolk & Nassau County, NY

Long Island winters bring hard freezes that can crack pipes, damage valves, and destroy sprinkler heads if a system is not properly shut down before the cold sets in, and McCormack Irrigation’s winterizing service is designed to protect that investment from end to end. We serve properties throughout Brookhaven, Hempstead, and across Suffolk County and Nassau County, and fall is one of our busiest seasons, since the window for winterizing safely before the first hard freeze is often shorter than homeowners expect.

At closing, our team drains or blows out every component of your system, including sprinkler heads, piping, fittings, solenoid valves, manifolds, exposed plumbing, and any hose bibs that are directly attached to and part of your irrigation system. This thorough, component by component approach is what keeps our customers from facing costly repairs when spring turn on rolls around, and it is a very different result from a quick shutdown that only addresses the most visible parts of the system.

Water is unforgiving when it freezes inside a closed pipe or valve, expanding with enough force to crack fittings and split components that are otherwise built to last for years. Because Long Island winters bring unpredictable freeze and thaw cycles, a partial winterizing job can leave hidden water sitting in a low point of the system for weeks, waiting for the coldest night of the season to cause damage. Our technicians are trained to trace every line on your property so nothing gets missed, whether it is a straightforward residential layout or a larger commercial system with multiple zones and manifolds.

What Our Winterizing Service Includes

• Complete blowout or draining of all sprinkler heads throughout the property
• Draining and clearing of piping, fittings, and manifolds to prevent freeze damage
• Protecting solenoid valves from the cracking that hard freezes can cause
• Clearing exposed plumbing connected to your irrigation system
• Shutting down and draining hose bibs that are part of your irrigation setup
• A final check of the shutoff valve and backflow device to confirm the system is fully secured for winter

How Our Winterizing Process Works

Our technicians begin by shutting off the water supply to the irrigation system and isolating the backflow device before moving through each zone with compressed air to force remaining water out of the piping and sprinkler heads. We work zone by zone rather than treating the system as a single unit, which allows us to confirm that every section, including any far corners of the property, has been fully cleared.

Once every zone has been blown out, we drain low point valves, manifolds, and any exposed plumbing that could hold standing water, and we confirm that hose bibs tied into the irrigation system have also been shut down properly. We finish with a walkthrough explaining what was done, so you know your system is fully protected heading into the winter months.

Signs You Should Not Delay Winterizing Service

• Overnight temperatures in your area are beginning to approach or dip below freezing
• Your system was winterized late or incompletely in a previous year
• You added new zones, heads, or landscaping since your last winterizing appointment
• You are unsure whether your existing service fully cleared every hose bib and manifold
• You want documented peace of mind before you stop thinking about your system until spring

Why Homeowners and Businesses Across Suffolk and Nassau County Choose McCormack Irrigation

A rushed or incomplete winterizing job is one of the most common reasons irrigation systems fail in the spring, and it is a problem that is entirely preventable with the right process. Our team has been protecting Long Island properties from freeze damage since 2001, and we know exactly which components need attention in our climate, from older systems with original piping to newer installations with multiple zones. We are family owned and operated, we never use subcontractors, and our A+ Better Business Bureau rating reflects a level of consistency our customers have come to expect year after year, no matter which technician from our team arrives at their property.

Our Commitment to Protecting Your System Through Winter

We treat winterizing as preventative work, not an afterthought at the end of the season, because the cost of a missed component is almost always higher in the spring than the cost of doing the job thoroughly in the fall. Our technicians follow the same detailed process at every property, whether it is a modest residential yard or a large commercial site with dozens of zones, and we document any concerns we find along the way so nothing is left to guesswork. That consistency is a big reason so many of our winterizing customers also rely on us for spring turn on, since the same team that shut the system down safely is the one confirming it starts back up correctly.

Understanding Long Island’s Freeze Risk

Long Island’s proximity to the coast creates a freeze pattern that can catch homeowners off guard, since inland temperatures a short drive away can be noticeably colder than areas closer to the shoreline. That variation means a hard freeze can arrive earlier in communities like Smithtown or Riverhead than it does in coastal areas such as Long Beach or Glen Cove, and a winterizing schedule based on a single regional date can leave some properties exposed. Our team tracks these patterns closely and prioritizes scheduling so properties in higher risk areas are not left waiting until the very end of the season. It is also worth noting that ground temperature does not always match air temperature, and pipes buried at a typical depth can still be vulnerable even after a string of mild days, since frost can penetrate the soil gradually over the course of the season. This is part of why we recommend winterizing on a consistent fall schedule every year rather than waiting to see how cold a particular week becomes, since the goal is to remove risk entirely rather than react to it after the fact. We also encourage customers with larger or older systems to schedule earlier in the fall window, since properties with more zones simply take longer to fully clear, and a busy weather forecast can compress our available appointment slots quickly once the first real cold snap is announced across the region.

Serving Brookhaven, Hempstead, and All of Suffolk and Nassau County

In addition to Brookhaven and Hempstead, McCormack Irrigation proudly serves Islip, Huntington, Babylon, Smithtown, Southampton, Riverhead, Southold, East Hampton, Shelter Island, Oyster Bay, North Hempstead, Long Beach, and Glen Cove. If you live or operate a business anywhere in Suffolk County or Nassau County, our team is ready to help.

Frequently Asked Questions

When should I schedule winterizing service?

Winterizing should be scheduled before the first hard freeze of the season. We recommend booking early in the fall since this is one of our busiest times of year.

What happens if I skip winterizing service?

Water left in pipes, valves, and sprinkler heads can freeze and expand, cracking components and leading to costly repairs when the system is turned back on in the spring.

Do you drain the entire system or just the main lines?

We drain or blow out every component connected to your irrigation system, including sprinkler heads, piping, fittings, solenoid valves, manifolds, and exposed plumbing.

Are hose bibs included in winterizing service?

Any hose bibs directly attached to and part of your irrigation system are included in our winterizing process.

How long does a winterizing appointment take?

Most residential winterizing appointments take under an hour, though this can vary based on the number of zones and the complexity of your system.

Is winterizing service available for commercial irrigation systems?

Yes. We provide winterizing service for both residential and commercial irrigation systems throughout Suffolk County and Nassau County.

Will winterizing my system prevent all freeze damage?

A thorough winterizing service significantly reduces the risk of freeze damage by removing water from the system before temperatures drop, which is why proper technique and complete coverage matter.

Can I winterize my own system instead of hiring a professional?

Some homeowners attempt this, but incomplete blowouts are common without the right equipment and experience, which is why many customers prefer to have trained technicians handle the full process.

Do you also handle spring turn on after winterizing?

Yes. We provide spring turn on service every year to safely restart your system once the risk of freezing has passed.

What should I do if my system was not winterized last year and I suspect damage?

Contact our team for an inspection. Our technicians can identify freeze damage and recommend the right repairs before you rely on the system again.

Ready to get started? Call McCormack Irrigation today at (631) 744-1500 or contact us online to schedule your winterizing service in Brookhaven, Hempstead, or anywhere across Suffolk and Nassau County, NY.