Why Winterizing Your Precious Pressure Washer Is Important and How to Do It

If you are familiar with the winter season, you probably know how the extreme freezing conditions take a toll on machinery. Fortunately, there are several precautionary measures to undertake to protect your equipment, including your valuable pressure washer. You still need it after winter to perform necessary tasks like vehicle cleaning, and proper storage will keep it in good condition. By properly keeping your electric or gasoline-powered pressure washer, it will roar back to life without any hitches when you take it out of storage after winter. This article will take you through the basics of winterizing your power washing machine during the off-season. But first, why is winterizing important?

Why Should You Winterize Your Pressure Washer?

Because of winter’s freezing conditions, you need to prepare your pressure washer for proper storage. Proper storage during winter facilitates the protection of internal seals by keeping them greased when inactive. Freezing temperatures are a big enemy to your pressure washer, as they render it inoperable by severely destroying the internal seals. Damaged internal seals lead to pipe cracking and dry rot in your pressure washing machine. Also, if you own a gasoline-powered unit, leaving some ethanol to sit in your fuel tank during winter can lead to severe issues, including pipe corrosion. You don’t want that, do you?

Leaving water in your pressure is also not the best idea in pressure washer maintenance. The water left inside can freeze and expand, bursting the water hose. Water also creates the perfect environment for the growth of mildew and mold, which will slowly eat away the clog lines and seals. All these are sure ways to render your once active pressure washer useless effectively, and that is why you need to winterize it.

Steps to Winterize a Gas-Powered Pressure Washer

  1. Purchase a suitable fuel stabilizer and a pump saver for your machine.
  2. Add the fuel stabilizer to the fuel tank and let it run for about 2 minutes to facilitate circulation.
  3. Fill up a bucket with clean water.
  4. Attach a garden hose to the pressure washing machine. Place the detergent hose feed in the bucket and turn the pressure washer on and let it run to flush out all the leftover detergent.
  5. Turn off the water supply from the garden hose in the bucket. Pull the trigger again under a low-pressure nozzle to expel the remnant water in the pressure washer.
  6. Remove all the connected hoses and drain the water from the extension, hoses, and gun. Then, add an anti-freeze pump saver to the pump inlet while carefully following the manufacturer’s guidelines on the package.
  7. Cover the pressure washing machine and store it in a clean and dry place.

Steps to Winterize Your Electric Pressure Washing Machine

  1. Put the detergent suction hose into a bucket of clean tap water. Attach the garden hose and then switch on the tap. Turn on the pressure washer and then hold the gun while spraying the water for about 2 minutes, ridding the system of leftover detergent solution. Then, disconnect the garden pipe and pull the trigger again to remove all the water in the electric pressure washer.
  2. Add anti-freeze to the pump inlet and then store it in a clean, safe, and dry place.


You need to properly store your pressure washer during the off-season, typically winter. Winterizing the washer ensures that the machine remains in perfect condition and runs smoothly when you start using it again after winter.

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Adam believes that you can have anything you want in life, if you are willing to work for it. He has worked hard for everything he has, and is grateful for every opportunity that comes his way. Adam is a veteran of the United States Marine Corps and proudly served his country. He is currently the owner of two businesses, and is always looking for new opportunities to help others achieve their goals.

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