Description
Optimize your closed hydronic heating system with the Caleffi 535051A AutoFill™ Automatic Boiler Fill Valve, a premium automatic filling valve engineered for commercial and residential applications. Designed to maintain consistent system pressure and simplify boiler feed tasks, this industry-trusted component ensures reliable performance and long-term durability — ideal for professional HVAC and plumbing installations.
Key Features
-
Automatic Pressure Control: The 535051A automatically fills your closed hydronic system to the preset pressure level and stops when the desired pressure is reached, eliminating manual filling and reducing system downtime.
-
Integral Pressure Gauge: Built-in pressure gauge and adjustment knob make monitoring and setting the precise outlet pressure fast and accurate right at the valve.
-
Durable Brass Construction: Rugged brass body provides long-lasting corrosion resistance and dependable service in demanding environments.
-
Pre-Adjustable Factory Setting: The valve comes factory-preset to 15 psi and can be easily adjusted between approximately 6–90 psi to match your system requirements.
-
3/4″ MNPT Union Connection: Standard male threaded union ensures a secure, leak-resistant installation on water inlet piping.
-
High Pressure Rating: Handles up to 365 psi for robust performance in commercial boiler and hydronic systems.
