Maid O' Mist 9AS Air Vent Shortstop

The Maid O' Mist 9AS Air Vent Shortstop is a reliable automatic shut-off valve designed for air vents in residential heating systems. This spring loaded unit provides dependable shut-off and quick response to trapped air, helping protect radiators and baseboard zones from leaks and air locks.

Size 1/8 Inch Male Threaded, it fits standard air vents across float operated convector radiator/baseboard radiation/radiant panel air vent configurations. It’s compatible with Auto-Vents models and Part Nos 66, 67, 78, making it a versatile replacement for older setups.

• Type: Automatic Shut-Off, Spring Loaded
• Size: 1/8 Inch Male Threaded
• Applications: Float Operated Convector Radiator/Baseboard Radiation/Radiant Panel Air Vent
• Compatibility: Auto-Vents; Part Nos 66, 67, 78
• Benefits: Reduces air pockets and ensures efficient system operation