How to Protect Your Misting System in Winter: What We Tell Every Customer
Every year around this time the phone starts ringing with the same question, and October 2026 has been no different. The weather finally breaks, people shut the misting system off for the season, and then a few weeks later they start wondering whether they just left a few thousand dollars of equipment sitting outside to freeze. It is a fair worry. We have been designing, manufacturing, and installing misting systems since 1998 — 28 years now — and I can tell you that more systems are damaged by one bad cold snap than by an entire summer of hard running. So let me walk you through how we actually protect a misting system in winter, the same way I would explain it standing in your backyard or on your restaurant patio.
WHY WINTER IS HARDER ON A MISTING SYSTEM THAN SUMMER
A high-pressure misting system is a water system, and water does one thing when it freezes: it expands. Inside your misting lines, that expansion has nowhere to go. The tubing can split, fittings can crack, and the real heartbreaker is the pump — a frozen pump head or a cracked check valve usually means a repair bill that would have been avoided with twenty minutes of work in the fall.
The other thing people underestimate is standing water. Even if you never see a hard freeze, water that sits in tubing all winter grows biofilm and lets minerals settle out and bake onto the inside of your nozzle orifices. Those orifices are tiny by design — that is what creates the flash-evaporating fog that can drop outdoor temperatures by up to 30 degrees — so it does not take much scale to ruin them. Half the clogged-nozzle calls we get in spring trace straight back to water that sat stagnant from November to April.
So winter protection is really two jobs: keep ice from breaking things, and keep stagnant water from fouling things. Do both and your system comes back to life next season like nothing happened.
STEP ONE: SHUT DOWN AND DEPRESSURIZE PROPERLY
Start by turning off the water supply to the pump, then let the system run for a few seconds to bleed off residual pressure. You want the lines relaxed before you start opening anything. After that, cut power to the pump at the breaker or unplug it — do not just flip the switch on the controller, because some units will kick on with a timer or thermostat call and run dry, which is rough on seals.
Once it is depressurized, open the lowest drain point or crack a fitting at the far end of the run and let gravity do its work. On most residential patio and pergola installs, that is enough to move the bulk of the water out. On longer commercial runs with multiple zones, we drain each zone separately so you are not fighting air locks.
STEP TWO: BLOW OUT THE LINES
Gravity alone leaves water sitting in low spots and loops. Our crews use low-pressure compressed air — regulated down, not full shop-compressor blast — to push the remaining water out through the nozzles or an open end fitting. Keep the pressure modest; misting tubing and slip lock fittings are built for high internal water pressure, but you do not need to hammer them with air to clear a line. Work from the pump outward and let it run until you see mist stop and dry air come through.
If you do not have a compressor, you are not out of luck. Pull the end plug, let the lines drain fully with the slope of the run, and then pull your nozzles so any trapped water has an escape route rather than a sealed pocket to freeze in.
STEP THREE: PULL AND CLEAN THE NOZZLES
This is the step people skip, and it is the one that pays off most. We remove the nozzles, soak them in a descaling solution or a mild vinegar bath, rinse them, and store them in a labeled bag indoors. You are accomplishing three things at once: you clear the mineral buildup from the season, you eliminate the number one freeze point in the whole system, and you give yourself a head start in spring. Replacement nozzles, filtration cartridges, and fittings are easy to get from our products catalog, and honestly, if your nozzles are a few seasons old and showing uneven spray patterns, winter is the right time to swap them rather than fight them next June.
While the nozzles are out, change your filters. Leaving a loaded sediment or carbon filter sitting wet all winter is just asking for odor and bacterial growth in the housing.
STEP FOUR: PROTECT THE PUMP
The pump is the expensive part, so it gets the most care. If it is a portable or easily disconnected unit, the simplest answer is the best one: bring it inside. A garage, a shed with some insulation, a utility closet — anywhere it will stay above freezing. Drain it first according to its manual, and if it uses pump oil, check whether a change is recommended before storage.
If the pump is hard-plumbed into an enclosure and cannot be moved, we drain it thoroughly, add a non-toxic RV-type antifreeze through the inlet where appropriate, and insulate the cabinet. On commercial sites in genuinely cold regions, we have also used thermostatically controlled heat tape and insulated enclosures so the system can stay in service into the shoulder season. That is common on hotel patios and restaurant decks that want misting available on warm late-fall afternoons — we cover those setups in more detail on our hospitality systems page.
STEP FIVE: DO NOT FORGET THE FANS AND PORTABLE GEAR
Mist fans, portable units, and mobile misting trailers need the same courtesy. Drain the reservoirs and pumps, dry them out, clean the nozzle rings, and store them covered and out of the weather. Water left in a fan sump over a cold winter will crack a housing just as fast as it cracks a tube. If you run seasonal equipment for events, this is also a good moment to look at whether renting makes more sense than storing — we operate the largest misting fan rental fleet in the US and ship rentals nationwide, with local pickup and delivery available in the Pensacola, Florida area.
A QUICK WORD ON COLD-WEATHER SAFETY
One thing I always mention: if you are keeping any part of the system running in cool weather, watch for icing on walkways. The CDC's guidance on winter weather injuries points out that slips and falls on ice are one of the most common cold-season hazards, and a mist line running over a walkway in near-freezing temperatures can glaze a surface fast. We generally recommend shutting a system down well before temperatures approach freezing rather than trying to squeeze out one more evening.
WHAT WE DO ON OUR SERVICE CALLS
With more than 55 years of combined industry experience on our team, we have a rhythm to winterization visits: depressurize, drain, blow out, pull and clean nozzles, change filtration, pull or protect the pump, inspect every fitting and line clamp, and then photograph the system so we know exactly what we are walking back into for spring startup. Customers across the country do the same thing themselves with good results — it is not complicated work, it just has to actually get done. If you are unsure about your specific setup, call us at (850) 203-1998 or reach out through our contact page and we will talk you through it.
KEY TAKEAWAY: Protecting your misting system in winter comes down to getting every drop of water out — drain and blow out the lines, pull and clean the nozzles, change the filters, and move the pump somewhere it cannot freeze. Twenty minutes in the fall prevents the cracked tubing, ruined nozzles, and damaged pumps we see every spring.
Give your system a proper rest this winter and it will be ready to keep you cool the moment the heat returns. When you need nozzles, filters, tubing, or a full replacement system, browse our misting products and Be COOL with Mist Works.
FAQ
Q: Do I really need to winterize if I live somewhere that rarely freezes?
A: Yes, though the focus shifts. Even in mild climates, stagnant water sitting in your lines all winter leads to mineral buildup and biofilm that clogs nozzles, so draining the system and cleaning or removing the nozzles is worth doing regardless of your low temperatures.
Q: Can I leave my misting pump outside under a cover?
A: A cover alone will not stop freezing. If the pump cannot be brought indoors, it needs to be fully drained and ideally housed in an insulated enclosure, with heat tape or non-toxic antifreeze used where appropriate for your climate.
Q: When should I start up the system again in spring?
A: Once your area is reliably past the last hard freeze. Reinstall your cleaned nozzles, install fresh filters, flush the lines with the nozzles out before reinstalling them, then pressurize and check every fitting for leaks before you call it done.
Back to BlogWHY WINTER IS HARDER ON A MISTING SYSTEM THAN SUMMER
A high-pressure misting system is a water system, and water does one thing when it freezes: it expands. Inside your misting lines, that expansion has nowhere to go. The tubing can split, fittings can crack, and the real heartbreaker is the pump — a frozen pump head or a cracked check valve usually means a repair bill that would have been avoided with twenty minutes of work in the fall.
The other thing people underestimate is standing water. Even if you never see a hard freeze, water that sits in tubing all winter grows biofilm and lets minerals settle out and bake onto the inside of your nozzle orifices. Those orifices are tiny by design — that is what creates the flash-evaporating fog that can drop outdoor temperatures by up to 30 degrees — so it does not take much scale to ruin them. Half the clogged-nozzle calls we get in spring trace straight back to water that sat stagnant from November to April.
So winter protection is really two jobs: keep ice from breaking things, and keep stagnant water from fouling things. Do both and your system comes back to life next season like nothing happened.
STEP ONE: SHUT DOWN AND DEPRESSURIZE PROPERLY
Start by turning off the water supply to the pump, then let the system run for a few seconds to bleed off residual pressure. You want the lines relaxed before you start opening anything. After that, cut power to the pump at the breaker or unplug it — do not just flip the switch on the controller, because some units will kick on with a timer or thermostat call and run dry, which is rough on seals.
Once it is depressurized, open the lowest drain point or crack a fitting at the far end of the run and let gravity do its work. On most residential patio and pergola installs, that is enough to move the bulk of the water out. On longer commercial runs with multiple zones, we drain each zone separately so you are not fighting air locks.
STEP TWO: BLOW OUT THE LINES
Gravity alone leaves water sitting in low spots and loops. Our crews use low-pressure compressed air — regulated down, not full shop-compressor blast — to push the remaining water out through the nozzles or an open end fitting. Keep the pressure modest; misting tubing and slip lock fittings are built for high internal water pressure, but you do not need to hammer them with air to clear a line. Work from the pump outward and let it run until you see mist stop and dry air come through.
If you do not have a compressor, you are not out of luck. Pull the end plug, let the lines drain fully with the slope of the run, and then pull your nozzles so any trapped water has an escape route rather than a sealed pocket to freeze in.
STEP THREE: PULL AND CLEAN THE NOZZLES
This is the step people skip, and it is the one that pays off most. We remove the nozzles, soak them in a descaling solution or a mild vinegar bath, rinse them, and store them in a labeled bag indoors. You are accomplishing three things at once: you clear the mineral buildup from the season, you eliminate the number one freeze point in the whole system, and you give yourself a head start in spring. Replacement nozzles, filtration cartridges, and fittings are easy to get from our products catalog, and honestly, if your nozzles are a few seasons old and showing uneven spray patterns, winter is the right time to swap them rather than fight them next June.
While the nozzles are out, change your filters. Leaving a loaded sediment or carbon filter sitting wet all winter is just asking for odor and bacterial growth in the housing.
STEP FOUR: PROTECT THE PUMP
The pump is the expensive part, so it gets the most care. If it is a portable or easily disconnected unit, the simplest answer is the best one: bring it inside. A garage, a shed with some insulation, a utility closet — anywhere it will stay above freezing. Drain it first according to its manual, and if it uses pump oil, check whether a change is recommended before storage.
If the pump is hard-plumbed into an enclosure and cannot be moved, we drain it thoroughly, add a non-toxic RV-type antifreeze through the inlet where appropriate, and insulate the cabinet. On commercial sites in genuinely cold regions, we have also used thermostatically controlled heat tape and insulated enclosures so the system can stay in service into the shoulder season. That is common on hotel patios and restaurant decks that want misting available on warm late-fall afternoons — we cover those setups in more detail on our hospitality systems page.
STEP FIVE: DO NOT FORGET THE FANS AND PORTABLE GEAR
Mist fans, portable units, and mobile misting trailers need the same courtesy. Drain the reservoirs and pumps, dry them out, clean the nozzle rings, and store them covered and out of the weather. Water left in a fan sump over a cold winter will crack a housing just as fast as it cracks a tube. If you run seasonal equipment for events, this is also a good moment to look at whether renting makes more sense than storing — we operate the largest misting fan rental fleet in the US and ship rentals nationwide, with local pickup and delivery available in the Pensacola, Florida area.
A QUICK WORD ON COLD-WEATHER SAFETY
One thing I always mention: if you are keeping any part of the system running in cool weather, watch for icing on walkways. The CDC's guidance on winter weather injuries points out that slips and falls on ice are one of the most common cold-season hazards, and a mist line running over a walkway in near-freezing temperatures can glaze a surface fast. We generally recommend shutting a system down well before temperatures approach freezing rather than trying to squeeze out one more evening.
WHAT WE DO ON OUR SERVICE CALLS
With more than 55 years of combined industry experience on our team, we have a rhythm to winterization visits: depressurize, drain, blow out, pull and clean nozzles, change filtration, pull or protect the pump, inspect every fitting and line clamp, and then photograph the system so we know exactly what we are walking back into for spring startup. Customers across the country do the same thing themselves with good results — it is not complicated work, it just has to actually get done. If you are unsure about your specific setup, call us at (850) 203-1998 or reach out through our contact page and we will talk you through it.
KEY TAKEAWAY: Protecting your misting system in winter comes down to getting every drop of water out — drain and blow out the lines, pull and clean the nozzles, change the filters, and move the pump somewhere it cannot freeze. Twenty minutes in the fall prevents the cracked tubing, ruined nozzles, and damaged pumps we see every spring.
Give your system a proper rest this winter and it will be ready to keep you cool the moment the heat returns. When you need nozzles, filters, tubing, or a full replacement system, browse our misting products and Be COOL with Mist Works.
FAQ
Q: Do I really need to winterize if I live somewhere that rarely freezes?
A: Yes, though the focus shifts. Even in mild climates, stagnant water sitting in your lines all winter leads to mineral buildup and biofilm that clogs nozzles, so draining the system and cleaning or removing the nozzles is worth doing regardless of your low temperatures.
Q: Can I leave my misting pump outside under a cover?
A: A cover alone will not stop freezing. If the pump cannot be brought indoors, it needs to be fully drained and ideally housed in an insulated enclosure, with heat tape or non-toxic antifreeze used where appropriate for your climate.
Q: When should I start up the system again in spring?
A: Once your area is reliably past the last hard freeze. Reinstall your cleaned nozzles, install fresh filters, flush the lines with the nozzles out before reinstalling them, then pressurize and check every fitting for leaks before you call it done.
