Caleffi’s 5350 Series AutoFill fast-fill/pressure-reducing valve maintains system pressure at a set value, automatically feeding water as required when installed on the water inlet piping in closed hydronic systems. The system pressure can be adjusted to the appropriate pressure before the system charging phase and will then automatically shut off the water feed. A pre-assembled internal cartridge contains the controlling components as a self-contained unit, facilitating ease of inspection and maintenance procedures. Available in 3/4” sweat or union connection, it includes an integral downstream pressure gauge and pressure-setting adjustment knob.
Hydronic Automatic Fill Valve
