Maid-O-Mist Auto Vent 1/4" I.P. Male Connection, 50 PSI

Maid-O-Mist Auto Vent. Vertical mounting
Size 4" x 1-9/16" 1/4" I.P. Male connection, 50 PSI.
Float-operated vents for installation on convector radiators, baseboard radiation, and radiation panels.
Designed for use where space is limited, the No. 66, 67 or 68 Auto-Vents with their small overall size may be installed in trouble spots previously neglected or improperly vented. For use on systems with pressures up to 50 lbs. No air required.
Related Accessories:
The No. 9AS Shortstop is an Automatic Shut-Off that saves hours when changing out Maid-O’-Mist® vents with 1/8” male connections. This accessory is a spring-loaded shut-off that stops the flow of water automatically when the vent is removed and re-opens when a new Maid-O’-Mist® vent is installed. With a Shortstop in place, it is no longer necessary to drain the system to switch out vents.
( Maid O Mist #68 # 68 )