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Dawn Martin DDSAug 13, 2025
Why is my U-Line H-3068 leaking air through the exhaust port?
- RRyan RoseAug 13, 2025
Air leakage through the exhaust port can occur due to a worn upper driver piston O-ring, a worn upper shuttle piston O-ring, or a worn valve stem seat. The suggested solution is to replace the worn upper driver piston O-ring, upper shuttle piston O-ring, or valve stem seat.

