What it does and why you need it Automatic air-vent valve for hydronic heating systems that removes trapped air continuously, preventing cold spots, noisy pipes and reduced heat output. Keeps your radiator and small heating units working efficiently without frequent manual bleeding. Key benefits Long-lasting brass construction: durable material reduces corrosion and the need for frequent replacement. Reliable automatic operation: continuously vents air to maintain smooth heat circulation and consistent room temperatures. Improved system efficiency: removing air improves heat transfer and can help your system reach set temperatures faster. Easy integration: designed to work with warm-water radiators and small heating appliances, it fits into existing heating setups with minimal modification. Important specifications Material: brass Function: automatic air vent for hydronic heating systems Compatibility: warm-water radiators and small heaters Maximum operating pressure: 150 psi Maximum temperature: 115 °C Practical applications / use scenarios Replacing a failing manual vent on a residential hot-water radiator to eliminate cold spots and reduce banging in the pipework. Installing on compact radiators or small zone heaters in apartments or small commercial spaces to maintain even heat without repeated maintenance. Upgrading boilers or pump stations in small hydronic loops where reliable automatic air removal reduces service calls and improves system stability. Why it stands out Combines robust brass construction with automatic air removal and high operating limits (150 psi, 115 °C) to deliver dependable performance in common radiator and small-heater installations. Ideal for anyone seeking lower maintenance and steadier heating performance.