Westward® Pump Sprayer, 4 Gal, Backpack Spraying

Take control of your outdoor spraying tasks with the Westward 4 Gallon Backpack Sprayer, model 36N340 — designed for durability, ease of use, and professional-quality results.

Key Features & Benefits

• Large 4-gallon (≈15.14 L) polyethylene tank provides ample capacity so you spend less time refilling and more time spraying. 
• Manual piston pump delivers up to 80 psi of pressure for strong spray coverage — ideal for herbicides, pesticides, fertilizers, and gardening chemicals.
• Built-for comfort: backpack style straps and manual pump design let you move freely across lawns, gardens, and landscaping zones without dragging a bulky unit.
• Durable materials: tank and wand built from chemical-resistant polypropylene and polyethylene, so it stands up to harsh formulas and repeated use. 
• Included features: in-tank filter to reduce clogging, 48″ (≈4 ft) PVC hose for reach and flexibility, wand length ~19.6″ for targeted spray; multiple nozzle patterns (fan, cone) for versatility. 
• Simple maintenance: 3/8″ fill opening helps fast refills; clear markings make measuring easier; robust construction supports long service life.

Why It’s Ideal For You
Whether you’re maintaining a residential property or handling commercial landscaping, this sprayer blends heavy-duty performance with user-friendly design. Its 4-gallon capacity reduces interruptions, while the 80 psi output provides the power to treat wide areas efficiently. Ideal for weed control, fertilization, pest treatment, and general garden care.
Backpack mobility and comfortable straps mean less fatigue, and the quality materials ensure the unit handles chemical exposure and frequent use with confidence.

Specifications At A Glance

• Tank Capacity: 4 gal (≈ 15.14 L) 
• Maximum Pressure: 80 psi 
• Tank Material: Polyethylene 
• Hose Length: 48″ (≈4 ft) 
• Wand Length: ~19.6″
• Nozzle Type: Fan & Cone patterns 
• In-Tank Filter: Yes 

Usage Tips

• Before first use, rinse the tank with clean water to remove any manufacturing residue.
• Always check the in-tank filter and hose for debris to maintain consistent spray performance.
• For best coverage, pump to full pressure (~80 psi) and maintain a steady wand speed across the surface you are treating.
• After use, flush with clean water and store in a shaded area — this prolongs the life of the tank material and seals.