How To Effectively Clean A Backpack Sprayer

Proper maintenance is the foundation of equipment longevity and consistent performance. For professionals who rely on their tools daily, a backpack sprayer is more than just a container; it is a precision instrument designed to deliver chemicals accurately and efficiently. However, even the most durable equipment can suffer from neglect. Residual chemicals can lead to clogs, seal degradation, and cross-contamination between jobs. 

Keeping your battery-powered sprayer clean is a straightforward process that ensures your unit remains ready for the next challenge. In this guide, we will walk you through two ways to clean your backpack sprayer effectively, protecting your investment and your reputation for quality work.

Important: Avoid using petroleum-based cleaners or undiluted bleach, as these can cause significant damage to the internal seals and components of your FlowZone® unit.

Why Regular Cleaning Matters

When you finish a day of applications, it is tempting to simply store your sprayer and move on. However, leaving chemicals in the tank or the internal lines can lead to several issues. Many professional-grade solutions can crystallize or thicken when left stagnant, which often results in clogged nozzles or damaged pump components.

Furthermore, residual chemicals can react with new solutions, potentially neutralizing their effectiveness or causing unexpected chemical reactions. By following a consistent cleaning schedule, you ensure that every application is as precise as the first.

Safety First: Preparing For Maintenance

Before you begin the cleaning process, safety should be your primary concern. Unlike a power washer or a paint gun, which operate under different mechanical principles, a FlowZone® sprayer utilizes a sophisticated battery-powered pump system that requires specific handling.

Remove the Battery

man removing the battery from a flowzone typhoon 3

Always remove the lithium-ion battery before performing any maintenance. This prevents accidental activation and protects the electrical components.

Dispose of Chemicals Safely

the inside of an empty flowzone sprayer tank

Any remaining chemical should be drained and disposed of according to the manufacturer’s instructions and local environmental regulations. According to the Environmental Protection Agency (EPA), improper disposal can lead to environmental contamination and health risks.

Wear Protective Gear

Even when cleaning, you may come into contact with chemical residues. Wear the appropriate gloves and eye protection as recommended by the chemical labels you have been using.

Method 1: Flush With Soap And Water

For most daily applications, a simple soap and water flush is highly effective. This method is gentle on the internal seals and helps break down most water-soluble chemicals.

Step 1: Initial Fill-up

man filling flowzone typhoon 3 using hose

Fill the tank with fresh water. Warm water is particularly effective at dissolving residues that may have begun to settle.

Step 2: Add The Soap

man pouring dish soap into the tank of a sprayer

Add a small amount of mild dish soap to the tank. 

Step 3: Agitate The Solution

man holding flowzone typhoon sprayer

Fill the tank further with water and agitate the mixture. You can do this by gently shaking the tank or by using the spray wand to circulate the soapy water back into the tank itself.

Step 4: Flush The System

man spraying into a bucket

Place a charged battery pack back into the sprayer and turn the unit on. Spray the soapy solution through the wand and handle assembly for 3-5 minutes or until the tank is empty. This will ensure the pump, hose, and nozzle are thoroughly cleaned.

Step 5: A Final Rinse

man filling sprayer with a garden hose

Empty any remaining soapy mixture from the tank and refill the sprayer with clean water. Flush the system again until no more soap remains in the tank.

 

 

Method 2: Using A Dedicated Spray Tank Cleaner

For tougher jobs or when switching between vastly different chemicals, such as moving from a herbicide to a fertilizer, a dedicated spray tank cleaner is recommended.

Step 1: Mix The Cleaning Solution

man adding spray tank cleaner to a flowzone sprayer

Follow the manufacturer’s label to mix the tank cleaner with the appropriate amount of water directly in the sprayer tank.

Step 2: Agitate And Circulate The Solution

man holding a flowzone sprayer

Ensure the solution is thoroughly mixed by agitating it in tank.

Step 3: Complete Flush

man spraying into a bucket with flowzone sprayer on table

Place a battery in the holster and power on your FlowZone® sprayer. Run the solution through the entire system until the tank is empty. 


Preparing Your Sprayer For Storage

man wiping flowzone sprayer using a cloth

Once your sprayer is clean, proper storage is the final step in your maintenance routine. Use a clean cloth to dry the exterior of the sprayer, paying close attention to the battery compartment.

Always store your FlowZone® sprayer in a covered, dry area. Extreme temperatures, whether intense heat or freezing frost, can negatively impact the integrity of the tank and the performance of the pump. By keeping your equipment in a controlled environment, you ensure it is ready to perform the moment you need it.

 

Frequently Asked Questions

Can I use bleach to clean my FlowZone® sprayer?

You should never use undiluted bleach in your sprayer. While diluted solutions are an effective way to soft wash exterior surfaces, undiluted bleach will rapidly break down the internal seals and damage the pump. Always refer to your operation guide for best practices when operating your sprayer.

How often should I clean my backpack sprayer?

Ideally, you should clean out your sprayer at the end of every workday. If you are switching between different types of chemicals, a thorough cleaning is mandatory to prevent cross-contamination and potential crop or property damage. 

Is it okay to leave the battery in the sprayer during storage?

We recommend removing the battery whenever the sprayer is not in use for an extended period. This prevents slow battery drain and ensures that the battery terminals remain clean and dry. For long term storage, make sure to check the charge levels every three months. Always charge your battery if it falls below 3 bars while in storage. Learn more about our batteries here.

What should I do if my nozzle is still clogged after flushing?

If a flush does not clear a clog, remove the nozzle tip and soak it in warm, soapy water. Use a soft brush or small pin to remove any debris.

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