User Manual for Chapin 21220XP Poly Sprayer
Quick guide for the Chapin 21220XP Poly Sprayer. Learn how to assemble, fill, pressurize, spray, and maintain your sprayer safely.
Quick answers from the manual
Quick answer
- The Chapin 21220XP is a manual pump sprayer. To operate, fill the tank, pump the handle until resistance is felt, and use the shut-off handle to spray. Always release pressure before opening the tank. p. 1
Key actions
- Pressurizing the tank p. 1
- Releasing pressure p. 1
First start
- Perform a pre-use check with water only, inspect for leaks, and ensure all parts are secure. p. 1
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Problems and fixes
Clean the filter located at the end of the white tube inside the tank.
p. 1Maintenance and reset
- Periodically oil the pump by dropping 10-12 drops of light oil down the pump rod. p. 1
Where to find it in the PDF
- Assembly and Parts p. 1
- Operation p. 1
- Maintenance p. 1
Table of contents
Quick guide from the manual
The Chapin 21220XP is a manual pump sprayer designed for various liquid applications. Safety Warning: Never use flammable, caustic, acidic, chlorine, bleach, or heat/gas-producing chemicals. Always wear protective gear (goggles, gloves, long sleeves) and release pressure before opening the tank.
Assembly
To assemble the hose to the tank:

- Ensure the white outlet tube is attached to the outlet tube adapter.
- Insert the outlet tube portion of the discharge assembly into the tank adapter.
- Firmly insert the outlet tube adapter into the tank adapter, lining up the tab with the notches.
- Tighten the retaining nut securely to the tank adapter.
Pre-Use Check
Before using the sprayer, perform these checks:
- Inspect the hose for cracks, softness, or brittleness. Replace if necessary.
- Check the tightness of the hose nut.
- Inspect the tank interior and exterior for signs of deterioration.
- Test the unit with water only first to check for leaks and ensure the discharge is not clogged.
- Inspect all metal parts (wand, nozzle, fittings) for rust or corrosion.
Filling
- Turn the pump handle counterclockwise to remove the pump.
- Prepare the spray solution according to the chemical manufacturer's instructions.
- Fill the tank to the appropriate gallon marker. Do not overfill.
- Ensure no debris is stuck to the pump barrel, then replace the pump and tighten securely.
Pressurizing and Spraying
- Pressurizing: Turn the handle clockwise to tighten. Pump until you feel resistance.
- Spraying: Push the handle down and turn 1/4 turn clockwise to lock. Begin spraying. Re-pump as needed to maintain force.
- Fatigue-Free Spraying: Push down on the shut-off handle and move the locking mechanism away from you. To release, squeeze the handle and move the mechanism back.
Releasing Pressure
Always release pressure before opening the tank:
- Lift and hold the pressure relief valve cap until air is completely exhausted, OR
- Turn the valve slowly counterclockwise until you hear air escaping and wait until all air is exhausted.
- Stay away from the sprayer until all air has escaped.
Care, Storage, and Maintenance
- Rinse the wand and nozzle thoroughly with water after each use.
- Run recommended solvent through the discharge assembly to clean.
- Release pressure, remove the pump, and empty the tank.
- Store the tank upside down with the pump removed in a warm, dry location.
- Periodically oil the pump by adding 10-12 drops of light oil down the pump rod.
Practical help
Common problems
Check for clogs in the nozzle or filter. Ensure the discharge assembly is not blocked.
Check hose tightness, inspect pump seal, and ensure the tank is not deteriorated.
Check hose nut tightness and inspect the tank for cracks or deterioration.
Before use
- Inspect hose for deterioration, cracks, or brittleness.
- Check tightness of the hose nut.
- Inspect tank interior and exterior for signs of deterioration.
- Test with water only (10-20 pump strokes) to check for leaks.
- Inspect metal parts (wand, nozzle, fittings) for rust or corrosion.
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Images and diagrams
- Hose to Tank: Shows the correct alignment of the white outlet tube, adapter, and retaining nut.
- Nozzle: Demonstrates how to attach the nozzle and switch between cone and stream spray patterns.
- Pressurizing: Illustrates the pump handle rotation to lock and unlock.
- Pressure Release: Shows the valve cap operation to safely exhaust air.
Model compatibility
- Do not use flammable, caustic, acidic, chlorine, bleach, or heat/gas producing chemicals.
Manual page author
Emily Carter
User documentation editor