Weber Huff 417-3 Manual Coin Air Vent 1/8 in Mnpt Brass

Product Description

The WEBER HUFF 417-3 is a manual coin air vent designed for hydronic heating systems, where trapped air in radiators and terminal units reduces system efficiency and causes noise. The unit connects via a 1/8 inch MNPT fitting and is constructed entirely of brass for corrosion resistance and long service life. A coin-slot operator on the vent body allows field technicians to manually bleed air without special tools. This type of vent is a standard component in residential and light commercial hydronic systems and is typically installed by licensed plumbers or hydronic heating technicians.

The 417-3 is suited for installation at high points on radiators, fan coils, and baseboards where air naturally collects. Manual coin vents are used in closed-loop hydronic systems, including hot water heating and chilled water applications, where periodic air purging is part of routine maintenance. The 1/8 inch MNPT connection is a common size for radiator bleed ports and baseboard coil tappings, making this vent a practical field replacement or new-installation component.

Key Features

• Coin-slot operation allows manual air bleeding without additional tools
• Brass construction provides corrosion resistance in hydronic system environments
• 1/8 inch MNPT connection fits standard radiator and coil bleed ports
• Compact profile suits tight installation points at high spots in the system
• Suitable for both residential and light commercial hydronic applications

Compatibility

Designed as an OEM-style replacement or new-installation manual air vent for residential and light commercial hydronic heating systems with 1/8 inch MNPT bleed port connections.

Installation Notes

Installation is typically performed by a licensed plumber or hydronic heating technician. Shut down the system and relieve system pressure before removing or installing any air vent fitting. Mount at the highest point of the radiator, coil, or loop to ensure effective air collection and release. After installation, open the coin slot slowly to bleed air, then close it fully to prevent water discharge.

Technical Specifications

• Connection Type: 1/8 inch MNPT
• Material: Brass
• Operation Type: Manual coin-slot
• Application: Hydronic heating systems

Standard Information

• Brand: WEBER HUFF
• Manufacturer Part Number: 417-3