How to Winterize Your Pressure Washer: Step-by-Step Guide
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Why it matters:
Freezing temperatures can cause water inside your pump, hoses, or unloader to expand, cracking components and causing costly damage. Winterizing prevents this.
Step 1: Turn Off and Disconnect
- Turn off the engine/motor and disconnect the spark plug (gas) or unplug (electric) for safety.
- Detach all hoses, spray guns, and nozzles.
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Drain any water from the hose, wand, and spray gun by holding them vertically and letting water flow out.
Step 2: Drain the Pump
- Place the washer on a flat surface.
- Remove the pump drain plug (if your model has one) and let any remaining water drain out completely.
- Turn the unloader slightly if needed to allow trapped water to escape.
Step 3: Add Pump Saver / Antifreeze
- Purchase a pump saver antifreeze solution (like Briggs & Stratton Pump Saver).
- Pour the recommended amount into the water inlet.
- Start the pressure washer briefly (follow product instructions) to circulate the antifreeze through the pump.
- Do not skip this step, as it protects internal seals from freezing and corrosion.
⚠️ Never use automotive antifreeze—it can damage your pump.
Step 4: Clean and Store Hoses & Nozzles
- Rinse off dirt, soap, and debris from hoses, wands, and nozzles.
- Store them coiled neatly in a dry place.
- Cover nozzles and quick-connect fittings to prevent dust and moisture buildup.
Step 5: Store Your Pressure Washer
- Keep your pressure washer in a dry, frost-free area (garage or shed).
- For gas models: consider draining fuel or adding fuel stabilizer to prevent stale fuel issues.
- Cover the unit with a breathable tarp or washer cover to keep dust off.
Step 6: Optional Extra Protection
- Inspect O-rings, seals, and spray tips for wear before storing.
- Lubricate O-rings on connectors with a silicone-based grease.
- Store accessories and chemicals separately in a dry area.
✅ Tip: If you follow these steps every fall, your pressure washer will start up easily in spring without leaks or pump damage.