Chapin 61800 Sprayer - Instruction Manual

Download the instruction manual for the Chapin 61800 plastic backpack sprayer below.

Chapin 61800 Sprayer Instruction Manual

The Chapin 61800 Instruction Manual provides full assembly, operating and maintenance details for the Chapin 61800 ProSeries Backpack Sprayer. Designed for professional and commercial use, this durable sprayer delivers consistent, high-performance application for cleaning, sealing, and lawn or garden treatments.

Product Overview

The Chapin 61800 ProSeries Backpack Sprayer features a heavy-duty 15.1-litre (4-gallon) tank made from high-density polyethylene for superior strength and chemical resistance. Its internal pressure chamber design maintains a steady, controlled spray while reducing fatigue during extended use.

Equipped with FKM seals, an adjustable brass and poly nozzle, and a reinforced hose, the 61800 is engineered for reliability and long service life. The adjustable shoulder straps and ergonomic pump handle provide comfort and balance during spraying tasks.

Key Features

15.1-litre (4-gallon) chemical-resistant tank
Adjustable brass and poly nozzles for varied spray patterns
Built-in pressure regulator with four settings (15–60 psi)
FKM seals for compatibility with harsh chemicals
Reinforced hose and stainless-steel wand for durability
Lockable shut-off handle for continuous spraying

Assembly & Operation

Attach the wand to the shut-off valve using the supplied O-rings and tighten the retaining nut.
Secure the shoulder straps to the frame for balanced carrying.
Fill the tank through the top opening with the required spray mixture, ensuring the filter basket is in place.
Pump the handle to pressurise the sprayer; adjust pressure using the built-in control valve.
Begin spraying and re-pressurise as necessary to maintain flow.
Always release pressure using the relief valve before opening the tank.

The Chapin 61800 is suitable for a wide range of liquid applications including pesticides, herbicides, fertilisers, and cleaning solutions.

Maintenance & Storage

Rinse the tank and hose thoroughly after each use.
Clean the nozzle and filter to avoid blockages.
Lubricate seals and O-rings with light oil or petroleum jelly.
Store in a cool, dry place away from direct sunlight and frost.
Replace worn components only with genuine Chapin parts.

Safety Precautions

Always wear protective clothing, gloves and goggles when spraying. Do not use flammable or corrosive chemicals. Ensure the sprayer is depressurised before maintenance or cleaning.