AIR VALVE - #H43 HB 1/4" ST

This 1/4-inch straight steam air vent purges air from a one-pipe steam radiator or convector so steam can enter, then closes automatically when steam reaches it. The fixed-orifice design is a straightforward replacement for worn or noisy 1/4-inch straight vents.

Key Features:

• Automatic Air Venting -- Opens to release air on a steam call and closes when steam or heat reaches the valve.
• Fixed Orifice -- Non-adjustable port for standard one-pipe steam venting.
• 1/4 in. NPT Straight Shank -- Threads into a radiator or convector vent tapping.
• Direct Replacement -- Swaps for common 1/4-inch straight steam vents.
• One-Pipe Steam -- For low-pressure one-pipe steam service.

Where to Use:

• Building maintenance -- Replacing failed, noisy, or spitting air vents on one-pipe steam radiators and convectors
• Steam system balancing -- Sizing vents by distance from the boiler so radiators heat evenly across the building
• Property heating upkeep -- Seasonal vent replacement in apartment buildings and older steam-heated properties