Winterizing a Pressure Washer: Guidelines and Tips

Winterizing a Pressure Washer: Guidelines and Tips

Living in a country which winter is part of the yearly season can be a bit hectic. Snow starts to fall and the level of heat starts to decrease. This kind of season will require you to have a regular adjustment with your equipment or appliances to avoid damage or malfunction.

Most of electrical motor and gas engine devices have the tendency to crash, break down, stop working or get permanently damaged. That is why you need to prep your things the moment the first snowflakes drop, especially those pressurized equipment like with the pressure washer.

It is one of the most common devices that are in danger during this season. That is why people prepare the adjustment beforehand and starts winterizing a pressure washer.

A cold winter can heavily damage your pressure washer. Immense cold expands the liquid inside and crack parts of your equipment such as the hose, tanks, detergent lines and more. Existing gasoline or petrol in the gas tank expands and clogs up, blocking the fuel and carburetor lines.

The damage that the freezing temperature will cause to your pressure washer can be prevented by taking a few extra and simple steps.Prevention is better for this situation because pressure washers don’t come cheap. This guide will provide you the steps. It won’t require you much but will save you some money.

Some people might think to avail the product’s warranty, the ones who are still under the contract but they need to think it over. Company’s or manufacturer’s warranty contract for pressure washer do not usually cover damages from cold temperatures or failing to prepare your equipment during winter.

Steps on How to Winterize Your Pressure Washers

There are 2 different steps on how to winterize the pressure washer, one for the electric motor pressure washer and the other for the gas or petrol engine pressure washer. You should know that an electric pressure washer does not have a gas tank so you only need to prepare or adjust lesser parts compared with a gas engine washer.

Electric Motor

Because the electric powered pressure washer doesn’t have a gas tank, there are only a few steps you need to follow so that you can winterize your equipment. This quick step will protect your pressure washer from the damages caused by freezing.


  • Assuming that the pressure washer is currently off. Put the device wheel on lock to keep it in place. You need to identify and sort out the pressure washer pump system for storage.
  • Prepare a bucket of water. Find the detergent or soap suction and put it into the bucket of water. If it’s in place, attached the water hose and turn on the pressure washer. Hold the gun or the nozzle and open the line of the spray for at least 2 minutes. This step will drain out remaining detergent or soap solution left. After a few minutes, disconnect the water hose and spray it again until the pumping system is fully empty.
  • The pressure washer is now ready for storage. Never forget to keep it indoors to prevent it from internal damage from freezing outside. You can choose to put pump sealants, pump shield or pump saver to protect the seals. It’s not that expensive and it is highly effective.

Gas Engine

There are two things you need to worry when you forget to winterize a gas engine pressure washer. It has a tank of gas or petrol which can expand and clog up the fuel lines.

You also need to think about the water and detergent left on the pump system. If you have no plans to use it, especially in cold weather, it is better to have both of them secured to avoid any internal and external damage.


  • First, you need to secure the fuel tanks. It is certain that only few people let the gas tank totally depleted. For sure it is at least half full or less, but regardless of the volume, you still need to secure it to avoid any damage. Buy yourself a plastic bottle of a gas stabilizer. This is used not only for washers but also in some other gasoline equipment. The stabilizer helps prevent corrosion, varnish formation and keeps the gas fresh for almost 12 months. If you already have one, add the stabilizer inside the gas tank. The amount varies on the gas left in the tank. Read the instructions carefully. After doing so, let the engine run for at least 2 minutes. It will help the stabilizer circulate and mix well with the gas.
  • The next step would be securing the pump system. You need to remove the water and the detergent or soap solution off the water system. Attach the water or garden hose to the pressure washer. Find the detergent tube and stick it down in a bucket full of water instead of the detergent tank. Turn on the equipment and press on the gun and let the water flow for a few minutes. Make sure that the nozzle is set to low pressure. This process cleans the equipment from left over detergents. After it’s done, remove the water hose out of the inlet and press on the gun again. This will stream out remaining water from the water system.
  • The last step would be the same with the electric motor pressure washer. Apply pump sealant, saver or shield to the inlet, and some important areas of the equipment. It’s antifreeze that will protect the inner seals of your pressure washer.


Never take low temperature, lightly especially with equipment that works with pressure and water. The cold makes the water expand, causing fragile parts of the device to crack, clog or have some obstruction if you don’t prepare it for winter. It’s a yearly task for someone who owns one. You should keep yourself reminded of the ways of winterizing a pressure washer.


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