Graco Magnum True Airless Project Painter Plus Owner's Manual page 32

Maintenance
4. Squeeze Pump Armor bottle until Pump
Armor flows into the Drain Tube.
5. Remove tool. Replace and tighten
child-proof cap for storage.
6. Reinstall the sprayer Suction Tube.
Ensure that the tube is snug on the inlet
and the clamp is engaged.
32 3A5431B EN