Automatic brass exhaust valve designed to prevent air locks and restore smooth water flow and heating efficiency in solar water heater and home heating systems. The valve vents trapped air automatically, requiring no manual bleeding and supporting reliable, continuous operation. Key features Function: Diaphragmdriven automatic exhaust that continuously releases trapped air to maintain pressure and circulation. Material: Cast brass construction for corrosion resistance and rustproof durability. Operation: Silent and efficient performance within a normal pressure range; suitable for continuous use in heating applications. Compatibility: Fits standard 1/2, 3/4, or 1 male thread connections for easy replacement and straightforward installation. Reliability: Designed for longterm use in residential heating and solar water heater setups. Why you need it Eliminates air locks that reduce flow and heat transfer, restoring system efficiency without manual intervention. Protects pumps and heat exchangers from issues caused by trapped air, reducing maintenance needs. Durable brass construction resists corrosion for stable performance over time. Typical applications Solar water heater collector loops: Automatically evacuates air from the of collectors and piping to prevent cold spots and maintain steady heat transfer. Residential hydronic heating systems: Fits radiators, manifolds, and boiler circuits to keep circulation smooth and pressure stable. Routine or upgrade: Direct replacement for existing vent valves with 1/2, 3/4, or 1 male threads during maintenance or system upgrades. Specifications summary Type: Automatic exhaust/vent valve Mechanism: Diaphragmdriven Material: Cast brass Thread sizes: 1/2, 3/4, or 1 male thread connections Intended use: Solar water heater systems and home heating applications Easy to install, corrosionresistant, and built for silent, automatic air removal to maintain system performance and extend component life. Note: Please allow 1-3 mm error/1-3g weight error and actual product color may vary due to lighting conditions.