Solo 425-Deluxe 4-Gallon Backpack Sprayer | Piston Pump, Up to 90 psi

Overview

The SOLO^® 425-DELUXE backpack sprayer is built for comfort and versatility, offering a piston pump as its core you can rely on for a wide range of spraying tasks. With a generous 4-gallon tank and an ergonomic design, it aims to make garden spraying feel less like a chore and more like a precise, controlled task. This model supports a variety of liquids—from cleaners and nutrients to plant protection formulations—designed to help you care for trees, shrubs, and other plants with ease.

Versatility in action

The 425-DELUXE is designed to handle multiple formulations without compromising performance. It is suitable for:

• Disinfectants and sanitizing liquids used around outdoor spaces
• Fertilizers and growth additives that nourish foliage
• Herbicides and pesticides for targeted plant protection
• Formulations tailored for trees, shrubs, and general plant health

Whether you’re treating a hedge row, fruiting trees, or a container garden, this sprayer adapts to tasks that require dependable push-button operation and a steady spray pattern.

Performance and control

The sprayer centers a high-performance piston pump capable of delivering substantial pressure, with an optional plug to unlock even higher capability. You can fine-tune spray output with a four-position regulator, choosing from 15, 30, 45, or 60 psi to match your liquid viscosity and target surface. The combination of strong reach and precise control makes it well-suited for constrained spaces and larger work areas alike.

• High-pressure piston pump supports demanding applications (up to 90 psi with optional plug)
• Adjustable regulator offers four output levels for versatility
• Extra large filling opening simplifies refilling and reduces spill risk
• Unbreakable 28-inch wand delivers long reach for tall plants
• Commercial shut-off valve with lock-on/lock-off minimizes fatigue during extended sessions

Comfort and durability

Designed with user comfort in mind, the 425-DELUXE features deluxe shoulder straps and a waist belt that distribute weight more evenly across your back. The rugged metal frame provides stability when the tank is full, while the smooth-running pump and minimal wear parts favor long-term reliability. An ergonomic design helps you maintain posture and control, even over extended spraying sessions.

Design details for daily use

• Extra large tank openings for easy filling and cleaning
• Deluxe carrying handle with wand retainer for convenient transport
• Fold-away handle with wand retainers for compact storage

Overall, the SOLO 425-DELUXE combines practical capacity, robust construction, and thoughtful ergonomics to support routine outdoor spraying tasks without demanding specialized equipment or frequent maintenance.

Key specs at a glance

• Tank capacity: 4 gallons
• Max pressure: up to 90 psi (with optional plug)
• Pressure regulator: 15, 30, 45, 60 psi
• Wand: 28 inches, designed for reach
• Comfort features: deluxe straps, waist belt, stable metal frame
• Fill and cleaning: large openings for efficiency