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My Siphon/Suction spray gun is spitting, sputtering or blowing bubbles in the cup.

Possible solutions:

Fluid tip is not properly seated into the head of the gun – tighten fluid tip.
Make sure the air cap is suction/siphon feed type – pressure feed air caps will not spray.
Check seating surface of fluid tip for scratches or gouges, also check seating surface inside head of gun. Replace if damaged.

Posted in: Spray Guns