3/4" NPT Male Union AutoFill Filling Valve Zoom

3/4" NPT Male Union AutoFill Filling Valve


Brand: Caleffi

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Size: 3/4"
Connection Type: Male NPT Union
Max Temp (F): 140°F
Max Pressure (PSI): 365
Pressure Set Point: 15 psi
Material: Brass

Description for Caleffi 535051A

The 5350 series AutoFill automatic filling valve is a pressure reducing valve which when installed on the water inlet piping in closed hydronic systems will maintain system pressure at a set value, automatically filling up with water as required. Fast fills the system to set pressure then automatically shuts off the water feed. This product is factory pre-set to 15 psi system pressure. To adjust the set pressure, simply turn the adjustment knob while observing the integral downstream pressure gauge. This product has the characteristic of being pre-adjustable, which means that it can be adjusted at the right pressure value before the system charging phase. After installation, the system pressure will automatically adjust itself to the set value and the water feed will stop when the set pressure is reached. The internal cartridge containing all the controlling components is pre-assembled as a self-contained unit, to facilitate inspection and maintenance procedures.

Technical specifications
Materials - body: brass

  • cover: glass fiber reinforced nylon PA66G30
  • control spindle: stainless steel
  • moving parts: brass
  • diaphragm and seals: NBR
  • filter: stainless steel

    Suitable fluids: water
    Max. working pressure: 365 psi (25 bar)
    Downstream pressure setting range: 6?90 psi (0.5?6 bar)
    Factory setting: 15 psi (1.035 bar)
    Max. working temperature: 140°F (0?60°C)
    Pressure gauge scale: 0?100 psi (0?7 bar)
    Filter mesh size: 0.51 mm (35 mesh)

    Connections: - NPT male union: 3/4"
  • sweat union: 3/4"
  • pressure gauge: 1/8" NPT

  • 3/4" NPT Male Union AutoFill Filling Valve

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    • 3/4" NPT Male Union AutoFill Filling Valve


      Will this work for a combi gas boiler which requires a lead free autofill valve? In other words, is this AutoFill Filling Valve lead free?
      Asked on 11/21/2014 by Nai

      1 answer



        no its not lead free

        Answered on 12/26/2014 by Supplyhouse Staff from New York
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