Husqvarna Backpack Sprayer, 18V 4-Gallon

The Husqvarna backpack sprayer uses an 18V battery-powered pump and a 4-gallon tank, so you get steady spray pressure without pumping a handle all day. It suits plant health care, landscape maintenance and property work where you cover a lot of ground with a wand.

Why a battery backpack sprayer

Manual backpack sprayers work, but they ask a lot. One hand pumps while the other aims the wand, and pressure rises and falls with every stroke. A battery-powered pump changes that. Pull the trigger and the pump keeps pressure steady, so coverage is more even and your arm is free to focus on aiming.

That matters on plant health jobs where you treat multiple beds, shrubs or small trees on a property. A backpack sprayer 4 gallon in size holds enough to make real progress before you need to refill, while still being light enough to carry once it is full.

It also helps with consistency. Steady pressure means a more consistent droplet size and application rate, which matters when you are following a label rate or calibrating a sprayer for a specific product.

Plant health and landscape uses

Arborists and landscapers use backpack sprayers for a range of applications: foliar fertilizers, horticultural oils, herbicide spot treatments around landscape beds, and other liquid products labeled for the target plant and pest. The 4-gallon tank and backpack design make it practical for walking a property and treating plants as you go.

Clean the tank, pump and wand thoroughly after every use, especially when switching products. Residue from an herbicide can damage the next plant you spray. Triple-rinse according to the product label and dispose of rinse water properly.

Calibrate before you start a job. Spray a measured area with plain water, time it and check how much you used. That tells you how to mix and how fast to walk so you apply the rate on the label. Recheck calibration when you change nozzles or products.

Safe and legal application

The pesticide label is the law. Read and follow it for every product you mix and apply, including the personal protective equipment it requires, mixing rates, re-entry intervals and environmental restrictions. Many states require a pesticide applicator license for commercial application. Check your state's rules before you treat customers' trees and landscapes.

Wear the PPE the label calls for, which often includes chemical-resistant gloves, eye protection and long sleeves. Avoid spraying in windy conditions, and keep sprays away from water, pollinators and non-target plants. Store products and the sprayer securely away from children and pets.

Battery care and who it is for

Charge the battery before each job and store it in a cool, dry place. Do not leave it in a hot truck cab for long periods. Check your battery and charger compatibility before you buy, since the sprayer needs a compatible 18V pack.

The Husqvarna 4 gallon backpack sprayer suits plant health technicians, landscapers and property owners who spray regularly and want to stop hand pumping. Browse more landscaper tools for the rest of your maintenance kit.