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frostroseAug 19, 2025
Why is paint leaking out of the cup threads of my Graco Paint Sprayer?
- KKelly BlackwellAug 19, 2025
If paint leaks out of the cup threads on your Graco Paint Sprayer, it may be because the cup is not properly seated. Verify the Cup Lid is tight and add Seal Lube (included) to the Cup Lid gasket to ensure an airtight seal. Also, make certain there is only one FlexLiner in the Cup Support and that there is no damage to or debris on the top sealing edge of the FlexLiner or Cup Lid gasket. Make certain the Cup Lid is properly threaded to the Cup Support, ensuring there are no threads visible when tight. Avoid flexing or pushing down on the Cup Support or pulling down on the FlexLiner when you evacuate the air out of the FlexLiner. If the issue persists, replace the FlexLiner.