How to Protect Your Misting System in Winter: What We Tell Every Customer
Here in September 2026, the phones have already started shifting. All summer long the calls are about heat, pressure, nozzle spacing, and getting misting fans out the door for events. But once the nights start cooling off, the questions change, and the one we hear most is some version of: what do I need to do to protect my misting system in winter?
I have been doing this long enough to tell you that the answer matters more than most people think. Mist Works has been designing, manufacturing, and installing misting systems since 1998 — we are celebrating 28 years this year — and if I had to name the single most common off-season repair we see, it would be freeze damage. Not worn pumps. Not clogged nozzles. Cracked heads, split tubing, and burst filter housings from water that sat in a system when the temperature dropped. Almost all of it is preventable in an afternoon.
WHY WINTER IS SO HARD ON A MISTING SYSTEM
A high-pressure misting system is, at its core, a network of small-diameter lines holding water under serious pressure, feeding nozzles with orifices smaller than a pinhole. That design is exactly what makes the mist flash-evaporate and drop outdoor temperatures by up to 30 degrees on a hot day. It is also exactly what makes the system vulnerable when it gets cold.
Water expands when it freezes. In a garden hose, that is not a big deal. In a stainless steel high-pressure line, a brass fitting, or a ceramic-orifice nozzle, that expansion has nowhere to go. We have pulled pump heads apart in March and found hairline cracks that nobody noticed until the system was fired up and started weeping water all over the pump enclosure. We have seen filter housings split right down the seam. And the worst part is that the damage usually hides until spring, when you are trying to get the patio ready for guests.
The other thing people underestimate is how far south freeze risk reaches. We ship products and parts all over the country and into the Caribbean, and even our Gulf Coast customers get hard freezes. If your area sees temperatures at or below 32 degrees even a handful of nights a year, your system needs winter protection.
STEP ONE: SHUT DOWN AND DEPRESSURIZE
The first thing we do on any winterization visit is kill power to the pump at the breaker or unplug it, then shut off the water supply feeding the system. After that, we open the system and let it bleed off pressure. On most residential setups, that means running the pump for a few seconds with the water off, or simply cracking a fitting or drain valve at the low point of the line until the pressure drops and water stops moving.
Never leave a system pressurized over winter. Pressurized water in cold lines is the fastest way to turn a small freeze event into a real repair bill.
STEP TWO: DRAIN THE LINES COMPLETELY
Depressurizing is not the same as draining. Water clings inside tubing, especially in long horizontal runs under a pergola or along a restaurant patio's roofline. We open the end cap or the furthest fitting on each zone and let gravity pull the water out. On longer commercial runs, we will push the remaining water out with low-pressure compressed air — and I mean low. Blasting 120 PSI of shop air through misting tubing can pop fittings and damage nozzle seats. Gentle and patient beats fast every time.
If your lines run uphill or have a dip in them, that is where water hides. Identify those spots now and drain them deliberately.
STEP THREE: TAKE CARE OF THE NOZZLES
This is the step most people skip. Nozzles are the smallest, most precise part of the whole system, and they are also the easiest to lose to a freeze. Our preference is to remove the nozzles, soak them in a proper descaling solution to clear out mineral buildup from the season, rinse them, dry them, and store them somewhere warm in a labeled bag. Then we plug the open ports with blanks so nothing nests in the lines over winter.
If pulling every nozzle is not practical on a large install, at minimum make sure the lines are fully drained so there is no standing water sitting behind each orifice. Come spring, you will already be halfway through your startup checklist. You can find replacement nozzles, blanks, filters, and fittings on our products page if yours have seen better days.
STEP FOUR: PROTECT THE PUMP AND FILTRATION
The pump is the expensive part, so it gets the most attention. If the pump is in an unheated location and you can remove it, bring it inside — a garage, a shed with some warmth, a utility closet. If it stays outside, drain it fully per the manufacturer's instructions, remove and empty the filter housings, and take the filter cartridges out. A soaked cartridge sitting in a housing all winter is a freeze crack and a mold problem waiting to happen.
Some of our commercial customers cannot shut down entirely — think facilities running odor control or dust suppression year-round at transfer stations and recycling yards. For those sites we design differently, with heat-traced lines, insulated enclosures, or automatic drain-down cycles. If you are running one of those systems, talk to us before winter rather than after. Our odor and dust suppression team deals with cold-weather operation every year.
STEP FIVE: COVER, LABEL, AND DOCUMENT
Last, we cover the pump enclosure to keep out debris and moisture, and we leave a note on the unit listing what was drained, what was removed, and where the nozzles are stored. It sounds fussy. It is not. Six months later, nobody remembers which bag the nozzles went into or whether the filter cartridge was replaced. A two-minute label saves an hour in April.
A QUICK WORD ON SAFETY AND WATER QUALITY
One thing worth mentioning: stagnant water in any plumbed system is not ideal. The CDC's guidance on water management in building water systems highlights that water sitting unused can allow bacterial growth. Fully draining your misting lines for the off-season is not just about freeze protection — it is also the cleanest way to store the system. When you start back up in spring, flush the lines before you reinstall nozzles.
WHEN TO CALL US INSTEAD
If your system is large, mounted high, or integrated with a building's plumbing, there is no shame in having it done professionally. We handle hands-on service in the Pensacola and Gulf Coast area, and for customers elsewhere in the country we are happy to walk you through your specific setup over the phone at (850) 203-1998 or point you to the right parts. With more than 55 years of combined experience on the team, we have seen just about every configuration out there. You can learn more about how we work on our about page.
KEY TAKEAWAY: The single biggest threat to your misting system in winter is water left sitting in the lines, pump, and nozzles — fully depressurize, drain, remove and store the nozzles and filters, and protect the pump, and you will avoid nearly every freeze-related repair we see each spring.
Winter is the easiest season to protect your investment, and an hour of care now means your patio, venue, or facility is ready the moment the heat returns. Stay cool, stay ahead of the freeze, and Be COOL with Mist Works — browse replacement nozzles, filters, and parts on our products page whenever you are ready.
FAQ
Q: Do I really need to winterize if I only get a few freezing nights a year?
A: Yes. It only takes one hard freeze to crack a nozzle, fitting, or filter housing, and the damage usually goes unnoticed until spring startup. Draining the lines and pulling the nozzles is a short job that protects the whole system.
Q: Can I leave my misting pump outside over the winter?
A: You can, as long as it is completely drained, the filter cartridges are removed, and the enclosure is covered. If the pump is easy to disconnect, though, we always recommend storing it somewhere warm and dry instead.
Q: Should I use antifreeze in my misting system?
A: We do not recommend pouring automotive antifreeze into a misting system that sprays into the air people breathe. Proper draining, and in some commercial cases heat tracing or insulated enclosures, is the right approach — give us a call and we will advise based on your specific setup.
Back to BlogI have been doing this long enough to tell you that the answer matters more than most people think. Mist Works has been designing, manufacturing, and installing misting systems since 1998 — we are celebrating 28 years this year — and if I had to name the single most common off-season repair we see, it would be freeze damage. Not worn pumps. Not clogged nozzles. Cracked heads, split tubing, and burst filter housings from water that sat in a system when the temperature dropped. Almost all of it is preventable in an afternoon.
WHY WINTER IS SO HARD ON A MISTING SYSTEM
A high-pressure misting system is, at its core, a network of small-diameter lines holding water under serious pressure, feeding nozzles with orifices smaller than a pinhole. That design is exactly what makes the mist flash-evaporate and drop outdoor temperatures by up to 30 degrees on a hot day. It is also exactly what makes the system vulnerable when it gets cold.
Water expands when it freezes. In a garden hose, that is not a big deal. In a stainless steel high-pressure line, a brass fitting, or a ceramic-orifice nozzle, that expansion has nowhere to go. We have pulled pump heads apart in March and found hairline cracks that nobody noticed until the system was fired up and started weeping water all over the pump enclosure. We have seen filter housings split right down the seam. And the worst part is that the damage usually hides until spring, when you are trying to get the patio ready for guests.
The other thing people underestimate is how far south freeze risk reaches. We ship products and parts all over the country and into the Caribbean, and even our Gulf Coast customers get hard freezes. If your area sees temperatures at or below 32 degrees even a handful of nights a year, your system needs winter protection.
STEP ONE: SHUT DOWN AND DEPRESSURIZE
The first thing we do on any winterization visit is kill power to the pump at the breaker or unplug it, then shut off the water supply feeding the system. After that, we open the system and let it bleed off pressure. On most residential setups, that means running the pump for a few seconds with the water off, or simply cracking a fitting or drain valve at the low point of the line until the pressure drops and water stops moving.
Never leave a system pressurized over winter. Pressurized water in cold lines is the fastest way to turn a small freeze event into a real repair bill.
STEP TWO: DRAIN THE LINES COMPLETELY
Depressurizing is not the same as draining. Water clings inside tubing, especially in long horizontal runs under a pergola or along a restaurant patio's roofline. We open the end cap or the furthest fitting on each zone and let gravity pull the water out. On longer commercial runs, we will push the remaining water out with low-pressure compressed air — and I mean low. Blasting 120 PSI of shop air through misting tubing can pop fittings and damage nozzle seats. Gentle and patient beats fast every time.
If your lines run uphill or have a dip in them, that is where water hides. Identify those spots now and drain them deliberately.
STEP THREE: TAKE CARE OF THE NOZZLES
This is the step most people skip. Nozzles are the smallest, most precise part of the whole system, and they are also the easiest to lose to a freeze. Our preference is to remove the nozzles, soak them in a proper descaling solution to clear out mineral buildup from the season, rinse them, dry them, and store them somewhere warm in a labeled bag. Then we plug the open ports with blanks so nothing nests in the lines over winter.
If pulling every nozzle is not practical on a large install, at minimum make sure the lines are fully drained so there is no standing water sitting behind each orifice. Come spring, you will already be halfway through your startup checklist. You can find replacement nozzles, blanks, filters, and fittings on our products page if yours have seen better days.
STEP FOUR: PROTECT THE PUMP AND FILTRATION
The pump is the expensive part, so it gets the most attention. If the pump is in an unheated location and you can remove it, bring it inside — a garage, a shed with some warmth, a utility closet. If it stays outside, drain it fully per the manufacturer's instructions, remove and empty the filter housings, and take the filter cartridges out. A soaked cartridge sitting in a housing all winter is a freeze crack and a mold problem waiting to happen.
Some of our commercial customers cannot shut down entirely — think facilities running odor control or dust suppression year-round at transfer stations and recycling yards. For those sites we design differently, with heat-traced lines, insulated enclosures, or automatic drain-down cycles. If you are running one of those systems, talk to us before winter rather than after. Our odor and dust suppression team deals with cold-weather operation every year.
STEP FIVE: COVER, LABEL, AND DOCUMENT
Last, we cover the pump enclosure to keep out debris and moisture, and we leave a note on the unit listing what was drained, what was removed, and where the nozzles are stored. It sounds fussy. It is not. Six months later, nobody remembers which bag the nozzles went into or whether the filter cartridge was replaced. A two-minute label saves an hour in April.
A QUICK WORD ON SAFETY AND WATER QUALITY
One thing worth mentioning: stagnant water in any plumbed system is not ideal. The CDC's guidance on water management in building water systems highlights that water sitting unused can allow bacterial growth. Fully draining your misting lines for the off-season is not just about freeze protection — it is also the cleanest way to store the system. When you start back up in spring, flush the lines before you reinstall nozzles.
WHEN TO CALL US INSTEAD
If your system is large, mounted high, or integrated with a building's plumbing, there is no shame in having it done professionally. We handle hands-on service in the Pensacola and Gulf Coast area, and for customers elsewhere in the country we are happy to walk you through your specific setup over the phone at (850) 203-1998 or point you to the right parts. With more than 55 years of combined experience on the team, we have seen just about every configuration out there. You can learn more about how we work on our about page.
KEY TAKEAWAY: The single biggest threat to your misting system in winter is water left sitting in the lines, pump, and nozzles — fully depressurize, drain, remove and store the nozzles and filters, and protect the pump, and you will avoid nearly every freeze-related repair we see each spring.
Winter is the easiest season to protect your investment, and an hour of care now means your patio, venue, or facility is ready the moment the heat returns. Stay cool, stay ahead of the freeze, and Be COOL with Mist Works — browse replacement nozzles, filters, and parts on our products page whenever you are ready.
FAQ
Q: Do I really need to winterize if I only get a few freezing nights a year?
A: Yes. It only takes one hard freeze to crack a nozzle, fitting, or filter housing, and the damage usually goes unnoticed until spring startup. Draining the lines and pulling the nozzles is a short job that protects the whole system.
Q: Can I leave my misting pump outside over the winter?
A: You can, as long as it is completely drained, the filter cartridges are removed, and the enclosure is covered. If the pump is easy to disconnect, though, we always recommend storing it somewhere warm and dry instead.
Q: Should I use antifreeze in my misting system?
A: We do not recommend pouring automotive antifreeze into a misting system that sprays into the air people breathe. Proper draining, and in some commercial cases heat tracing or insulated enclosures, is the right approach — give us a call and we will advise based on your specific setup.
