Bell & Gossett 113055 Air Vent

The Bell & Gossett 113055 #4 Air Vent is a precision-engineered manual air eliminator designed for high-efficiency hydronic heating systems. Known in the field as a coin-operated radiator vent, this component is the industry-standard direct replacement for DOLE-9 valves. It features a 1/8" NPT connection, making it compatible with most standard cast iron radiators and baseboard heating units. As a manual vent, it allows technicians to effectively bleed air from radiators, preventing air binding and ensuring optimal heat distribution throughout the loop. The durable brass construction and compact profile allow for reliable performance in tight clearances. For contractors managing older hydronic systems, utilizing the B&G 113055 manual air vent is essential for maintaining system pressure and eliminating the radiator cold spots often caused by trapped air pockets. This HVAC air elimination valve is a critical service part for restoring silent, efficient operation to residential and commercial boilers.

• Direct Interchangeability: Seamlessly replaces the legacy DOLE-9 vent without requiring piping modifications.
• Manual Air Control: Provides positive shut-off and controlled venting for precise system balancing.
• Robust Brass Construction: Engineered to withstand standard hydronic operating temperatures and pressures.
• Tool-Versatility: Accessible via a standard screwdriver or a technician's coin, simplifying onsite service calls.
• Compact 1/8" NPT Factor: Standard threading facilitates quick installation on a wide variety of radiator brands.

Is the 113055 compatible with steam systems?
This specific manual vent is designed for use in hydronic (hot water) heating systems. For steam applications, a dedicated steam air vent with a vacuum breaker or thermostatic element is required.

How do I resolve a leaking coin-operated vent?
Leaking usually indicates mineral buildup or a damaged internal seat. Because these are precision-machined components, the most cost-effective solution for a technician is a full replacement with a new 113055 unit.

What is the maximum operating pressure for this B&G vent?
The Bell & Gossett #4 vent is typically rated for standard residential and commercial hydronic pressures, generally up to 150 PSI, though system operating pressure is usually significantly lower.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.