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HOFFMAN VALVES & VENTS
MAIN VENT
HOFFMAN SERIES 79
¾" MIP x ½" FIP • Designed for both hot and cold water.
Safety drain connection for discharging moisture.
Built-in Check valve. Operating pressure 75 psi.
A931
Individually Boxed
MAIN VENT
HOFFMAN SERIES 4
(FOR STEAM HEATING SYSTEMS)
Main Vent ¼" size. Has no float. Will not close against water.
Vents air quickly. Operating pressure 25 lbs.
A932
Individually Boxed
MAIN STEAM VENT
HOFFMAN SERIES 4A
(FOR HEATING SYSTEMS)
Main Vent ¾" size. Equipped with float which closes
against water. Capacity up to 1000 sq. ft. of radiation.
A933
6 per Box
STEAM UNIT HEATER AIR VALVE
HOFFMAN SERIES 74
½" Female x ¾" Straight Shank • Designed for pressure
that constantly rises and drops. Float-type vent with single
non-adjustable port keeps pressure at a steady level.
Up to 25 lbs. pressure.
A934A
Individually Boxed
AIR VALVE
HOFFMAN SERIES 70A
Float-type vent with single non-adjustable port.
Operating pressure 11 psi.
A932B
Individually Boxed
FLOAT VENT
HOFFMAN
(FOR MAINS)
¾" Male x ½" Female • Float-type vent.
Use for mains of medium and large systems.
Stock
Pressure
Series
A934
3 PSI
75
A934B
3 PSI
76
A934C
10 PSI
75H
Individually Boxed