How To Use a Pressure Washer With Detergent

Pressure washers improve the effect of cleaning and reduce the amount of time you spend cleaning. Detergents quicken this process even more.

Pressure washers with detergents should be used when you are cleaning the siding of your home, your car or anything that needs to be thoroughly cleaned.

However, some detergents are highly costly, so it is better to know how to use the smallest amount of detergent and get the most effect out of them. 

1. Get rid of the Dirt First 

I highly recommend getting rid of the apparent hanging debris, leaves, mud and dirt before adding detergents to the pressure washer. This process will make the detergent focus on the real stains that water and pressure alone cannot remove. 

By doing this, you make sure that no amount of your detergent is lost in vain. 

2. Add Detergent to the Cleaning Tank


Most pressure washers have tanks that are specially designed to store detergents. 

The pressure washer draws up liquid soap from inside the tank and then mixes it with the water when it reaches the end of the nozzle. 

If you want to apply a more powerful wash to your sidings, you can use this kind of tank because it mixes detergents. 

3. Add Detergent to Guns and Brushes

Some types of pressure washer attachments allow you to place the soap directly onto them so that you can get a sharper clean for your sidings. 

An excellent example of this is the pressure washer brush. The brush allows you to apply the liquid detergent directly onto the bristles, which makes the soap focus more on the deep stains. 

The pressure washer gun is another attachment that works like the tank. It allows you to fit your liquid soap bottle onto the side of the gun, and apply detergent as you wish.

4. Add the Right Kind of Detergent 

The kind of detergent you should use depends on your needs. Some detergents perform better at high pressures than others, so determine how high you need the detergent to go and then get one that fits this amount of pressure. 

Moreover, testing a small area before applying the detergent on a large scale of the siding you want to clean is a smart and crucial thing to do to make sure that the kind of detergent and the amount of pressure you are using will not damage the siding. 

This is particularly important if you have vinyl siding as it is easily damaged by applying too much water. 

5. Applying the Detergent

Using an Electric-Powered Pressure Washer

In Case You Are Using a Detergent Bucket:

Prepare the unit for standard operation and attach the black low-pressure nozzle to the gun and wand assembly. 

Locate the detergent pick-up hose that is attached to the pressure washer pump, then submerge the end of this hose into the bottle of detergent, and make sure it stays submerged during the washing process.

In Case You Are Using a Detergent Tank:

After you fill the detergent tank, make sure that the valve is turned “on” so that the detergent will be applied when you spray. 

Since high-pressure nozzles do not work with detergents, switch to a low-pressure detergent nozzle. 

To prevent streaking, spray with the detergent in an upward motion, and overlap each pass slightly to make sure you do not leave anything untreated.

6. After Applying the Detergent 

After applying the detergent, leave it for about 5 to 10 minutes, but do not let it dry to avoid possible discoloration or damage by the detergent.

It is essential in hot and windy weather to reapply the detergent to make sure it does not dry.

Switch your detergent tank switch to “off” and squeeze your sprayer nozzle trigger to flush any remaining detergent out of the line once the soap has had time to loosen the dirt. 

Afterward, change the nozzle to a higher pressure nozzle that suits what you are cleaning. 

Clean the detergent from top to bottom to make sure it is thoroughly rinsed. 

If there are plants surrounding the area you are cleaning, it is better to spray water upon them to make sure they do not get harmed. 

Bottom Line:

Using a pressure washer with detergent will help you clean whatever you need with ease and speed. 

However, you should know how to use it correctly in order not to damage the thing you are cleaning by using higher pressure than appropriate or by using the wrong kind of detergent. 

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