Has it ever crossed your mind whether bleach can enhance the power of your pressure washer? It is recommended for eliminating molds, mildews, and other tough stains; however, is it safe for your machine? While giving excellent disinfecting and stain-removing properties, improper use can damage the internal components of the pressure washer, affect adjacent vegetation and also pose health hazards. This guide will address all your questions regarding the use of bleach in pressure washing and power washing. Read on to find out all your answers!

What Is Bleach and How Does It Work?

Bleach is a chemical oxidizer and stain remover. It is also known as sodium hypochlorite. This type of cleaning is very effective, especially against organic matter like mold, algae, and even bacteria.

Types of Bleach:

  • Household Bleach: It contains 5-6% Sodium Hypochlorite and is used widely for light cleaning work and laundry. It’s mostly used to whiten clothes. 
  • Industrial Bleach: This contains approximately 10-15% Sodium Hypochlorite. It is used widely for sanitizing large surfaces and inventory at commercial spaces.  
  • Oxygen Bleach (Sodium Percarbonate): Oxygen bleach is not harmful to the environment compared to Chlorine bleach and it is gentle.

Can You Use Bleach in a Pressure Washer?

This question is a little shady. A direct yes or no will not be a fair answer. It depends on several factors.

Manufacturer Guidelines

Most pressure washer companies do not recommend using bleach in their machines because it can:

  • Breakdown seals and hoses internally.
  • Deteriorate the pump and any metal parts.
  • Increase the chance of the pressure washer breaking.

 

Nonetheless, some commercial-grade pressure washers do have the capability to handle solutions, but only if they are used in diluted concentrations.

Pros and Cons of Using Bleach in Power Washers

Pros:

  • Helps in killing mold as well as algae. 
  • It also helps in removing deep stains, such as those from concrete, driveways, and vinyl siding. 
  • It can be used for disinfecting any outdoor surfaces.

Cons:

  • Can damage pressure washer components if not used properly.
  • Harmful to plants and the environment if not rinsed thoroughly.
  • May cause surface discoloration on wood, paint, and delicate materials.

What Type of Bleach Should You Use?

The type of bleach you use and how to dilute it properly are key to preventing any damage.

  • For heavy-duty cleaning, industrial-grade bleach (10-12% sodium hypochlorite) will work best. 
  • Mix a bleach-and-water solution composed of one part bleach and ten parts of water. 
  • Avoid gel or scented bleaches, as these can clog the pressure washer components.

Safe Methods for Using Bleach in Pressure Washers

How to Properly Mix Bleach for Pressure Washing

If you want to effectively use bleach without harming the equipment or increasing your carbon footprint then you have to be considerate. And the best solution will be to dilute it. Not diluted bleach can do much harm to the machine and environment as well.

Recommended Dilution Ratios:

  • 10% Bleach: 1 part bleach to 10 parts water.
  • 20% Bleach: 1 part bleach to 5 parts water.
  • 33% Bleach: 1 part bleach to 3 parts water.

Additional Cleaning Boosters:

  • Surfactants (Detergents): Helps bleach stick to surfaces for better cleaning.
  • Vinegar: Eco friendly substitute for light cleaning.
  • Soap Solutions: Aid in the formation of lather for dirt washing without the severe impact of bleach.

Pressure Washer

Step-by-Step Guide to Using Bleach in a Pressure Washer

Step 1: Preparation & Safety Gear

Before using bleach, wear protective gear:

  •  Rubber gloves 
  • Safety goggles 
  • Long-sleeve clothing
  • A mask to avoid inhalation

Ensure the surrounding area is clear of pets, plants, and children.

Step 2: Mix the Bleach Solution

To mix the solution. Firstly fill a bucket with water based on how much is your need. Then add in bleach. Be careful at this point to prevent splashing. And simply stir the solution. Make certain to not do it with your bare hands

Step 3: Set Up Your Pressure Washer

For setting up the pressure washer, use a chemical injector. Most modern washers has this option. Then attach a black soap nozzle, which is designed for low-pressure chemical application. Keep in mind to not use a high pressure nozzle because it can cause bleach splatter back.

Step 4: Apply the Bleach Solution

After spraying the bleach mixture evenly all over the surface, give it some rest of about 5-10 minutes. This helps in breaking down mold and stubborn stains. But, avoid letting the solution dry 100% because it can also  result in leaving residue and we don’t want that. 

Step 5: Rinse the Surface Thoroughly

  • Switch to a high-pressure clean water nozzle.
  • Rinse the surface with plenty of clean water to remove all bleach residue.
  • Pay extra attention to gutters, siding, and driveways, as bleach can pool in crevices.

Step 6: Flush Your Pressure Washer After Use

To prevent damage to the pressure washer:

This is the last step that many people overlook. Make certain to run clean water through the machine for at least 2-3 minutes.  This will prevent damage. Then simply just detach and clean hoses, injectors, and nozzles. 

Surfaces That Can and Cannot Be Cleaned with Bleach

Safe Surfaces for Bleach Cleaning:
  • Concrete driveways and sidewalks
  • Vinyl siding
  • Brick walls
  • Stone patios
Surfaces to Avoid with Bleach:
  • Painted wood (may cause fading or peeling)
  • Aluminum siding (can corrode metal)
  • Glass windows (may leave streaks or etching)
  • Natural stone (porous surfaces can absorb bleach and discolor)

Conclusion

Employing bleach in power washers and pressure washers can greatly assist in removing stains, molds, and mildews. However, these very solutions come with an environmental and health risk, damage your equipment, and worsen the working conditions. In the event that bleach needs to be used, always ensure proper dilution, do not target sensitive areas, and do a leftover rinse on your washer so it’s clean.

For a safer alternative, consider using oxygen bleach, vinegar solutions, or biodegradable detergents.. If you are finding companies that follow these best practices to safely clean outdoor surfaces, we at Superior tech Solutions can help you find “THE ONE”.