If you live in a region where temperatures drop below freezing, you need to winterize your pressure washer. Failing to do so can cause leftover water inside the pump, hoses, and gun to freeze, expand, and crack expensive components. The good news? Winterizing only takes a few minutes, and it can save you hundreds of dollars in repairs. In this guide, we’ll explain exactly how to winterize both gas and electric pressure washers, plus the best products to make the job easier.
Why Winterizing Matters
- Protects the Pump: Frozen water expands and cracks pump housings.
- Prevents Hose Damage: Water left in hoses can freeze and weaken them.
- Extends Lifespan: Proper storage keeps seals, gaskets, and O-rings from drying out.
- Saves Money: Repairs for cracked pumps can cost more than buying a new washer.
Quick Picks – Best Winterizing Products
- Best Pump Saver: Briggs & Stratton 6151 Pressure Washer Pump Saver – Protects seals and prevents freezing.
- Best Fuel Stabilizer: STA-BIL Storage Fuel Stabilizer – Keeps gas fresh for up to 24 months.
- Best Storage Cover: Classic Accessories Pressure Washer Cover – Shields your washer from dust and moisture.
How to Winterize an Electric Pressure Washer
- Disconnect the Hose and Gun: Remove the high-pressure hose and spray gun. Drain any water by pulling the trigger.
- Drain the Pump: Tilt the washer gently to pour out remaining water.
- Flush with Pump Saver: Connect a can of pump saver to the water inlet and spray until foam exits the pump outlet.
- Store Indoors: Keep the washer in a heated garage, basement, or storage area if possible.
How to Winterize a Gas Pressure Washer
- Run Fresh Water: Connect the garden hose and run clean water through the system to flush out detergent.
- Drain Fuel or Add Stabilizer: Either empty the fuel tank completely or add STA-BIL fuel stabilizer and run the engine for 2–3 minutes.
- Drain the Pump: Disconnect hoses and tilt the washer to drain water.
- Add Pump Saver: Use Briggs & Stratton Pump Saver to coat seals and prevent freezing.
- Remove Spark Plug (Optional): Add a few drops of oil into the cylinder to prevent rust if storing long-term.
- Store Properly: Keep it in a dry, covered location away from freezing temps if possible.
Step-by-Step: Using Pump Saver
One of the easiest ways to winterize a pressure washer is with a can of pump saver. Here’s how:
- Shake the can well.
- Attach it to the water inlet.
- Press until foam comes out of the outlet or nozzle.
- Leave the foam inside — it prevents freezing and lubricates seals.
Extra Winterizing Tips
- Never leave detergent in the washer — it thickens and clogs.
- Keep hoses disconnected during storage.
- If you must store outdoors, use a pressure washer cover and wrap the pump with insulation.
- Check for leaks or worn parts before storing to avoid surprises in spring.
Best Products for Winterizing
1. Briggs & Stratton 6151 Pump Saver
Protects pump seals, pistons, and valves from freezing and corrosion. Works with all brands. Check Price
2. STA-BIL Fuel Stabilizer
Keeps gas fresh for up to 24 months, prevents engine gumming, and ensures an easy start in spring. Check Price
3. Classic Accessories Pressure Washer Cover
Durable, waterproof cover that protects against dust, UV, and snow. Perfect if storing in a shed or garage. Check Price
4. AR Blue Clean Pump Saver Solution
Alternative pump protector that works with most electric and gas units. Check Price
Comparison Table – Winterizing Essentials
| Product | Use | Best For | Price |
|---|---|---|---|
| Briggs & Stratton Pump Saver | Prevents freezing & protects seals | All pressure washers | Check Price |
| STA-BIL Fuel Stabilizer | Keeps gas fresh | Gas pressure washers | Check Price |
| Classic Accessories Cover | Protects from dust & moisture | Gas & electric washers | Check Price |
| AR Blue Clean Pump Saver | Pump lubrication & antifreeze | Electric & gas washers | Check Price |
FAQ – Winterizing Pressure Washers
1. Do I need to winterize if I store indoors?
If stored in a heated garage or basement, winterizing is less critical. But using pump saver is still recommended.
2. Can I use RV antifreeze instead of pump saver?
RV antifreeze works, but pump saver is specifically designed to lubricate seals and prevent corrosion.
3. Do electric pressure washers need winterizing?
Yes. Water left in the pump can still freeze and crack components.
4. How often should I winterize?
Winterize at the end of every season if temperatures drop below freezing.
5. What happens if I forget?
Water expands when frozen, which can destroy the pump and leave you needing costly repairs or a replacement.
Conclusion
Winterizing your pressure washer is quick, easy, and protects your investment. For electric models, simply drain, flush with pump saver, and store indoors. For gas models, also add fuel stabilizer and drain hoses before storage. Add a cover for extra protection, and your washer will be ready to fire up in spring without issues.
Our recommendation: Keep a can of Briggs & Stratton Pump Saver in your garage — it’s the easiest way to protect your washer through winter.