When winter comes around, your pressure washer will be used less and be exposed to colder temperatures. Properly winterizing your equipment will protect it and maintain the life of it as it is used/stored in the winter months.
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#1 – Routine Maintenance is Key 🔑
ESSENTIAL MAINTENANCE BEFORE WINTER
Before you put your pressure washer into storage, it is important to perform routine maintenance that protects internal components from freezing and corrosion.
Drain and flush all water
Water left in the pump, hoses, or gun can freeze and expand, cracking parts of the system. Be sure to do the following:
- Disconnect all hoses and the spray gun
- Drain water from the pump by running the machine without the water supply for a few seconds (trigger not engaged)
- Use compressed air or pump antifreeze to clear out any remaining water from hoses and lines
Add pump saver or antifreeze
Pump saver lubricates the seals and prevents residual moisture from freezing. Add it through the pump inlet following the product instructions. This step is crucial for both electric and gas-powered models.
Change the oil (gas models)
If your machine uses a gas engine, change the oil before storage. Old oil contains moisture and contaminants that can damage engine parts.
Inspect & clean the system
- Check air filters and replace if dirty
- Clean the nozzles and spray gun
- Inspect hoses and fittings for cracks or wear
#2 – Location is Everything 📦
How to store your pressure washer during winter
Proper storage protects your equipment from temperature swings, condensation, and accidental damage.
Choose the right location
Store the unit in a dry, sheltered space where temperatures stay above freezing. Ideal locations include:
- Heated garage or shop
- Storage shed with insulation
- Equipment trailer
Avoid storing outdoors or in unheated areas where temperatures fall below 32°F.
Storage tips
- Coil hoses loosely to prevent kinks
- Cover the machine with a breathable tarp to keep dust off while allowing airflow
- For electric models, unplug & protect the cord from rodents or foot traffic
- For gas models, either drain the fuel or add a fuel stabilizer to prevent degradation over time
#3 – Protect Your Investment 🛡️
WHAT TO DO IF IT wasn’t winterized
If your pressure washer wasn’t winterized and hasn’t been used, you should take steps before using it again.
Inspection before use
- Check for cracks in the pump, hoses, and fittings – especially if the unit was exposed to freezing temps
- Look for corrosion around the pump and engine
- Test the spray pattern from your nozzles to ensure there are no blockages
Change fluids
If you didn’t change the oil before winter, be sure to do it before next use. Moisture buildup over the season can lead to rust or reduced engine performance.
Flush the system
Run clean water through the system before connecting chemical injectors or applying detergents. This removes any stale residue or debris from storage.
GET ASSISTANCE TODAY 📌
Our expert technicians are ready to help you winterize your pressure washer,
or repair equipment after the fact.
Things to Remember
- Perform routine maintenance to prevent additional wear in winter
- Store your equipment in dry spaces that don’t freeze
- Check pressure washers closely if it was not winterized
40%
of pressure washer users delay winterizing until after the first hard freeze
$800+
in repair costs if water freezes inside components like the pump or coil
70%
of winter service calls are because of freezing-related damage
“I have owned a pressure washing business for 10 years and my only regret is not finding them sooner. The guys are always patient and honest with me.”
– Fernando M, McHenry PCS client
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