Caleffi AutoFill™ 553649A Pre-Adjustable Automatic Filling Valve, 1/2 in, C x FNPT, 230 psi, Brass Body

CAL553649A MFG #: 553649A
  • Body Material: Brass
  • Dimensions: 4-3/4 in L
  • End Style: C x FNPT
  • Manufacturer Name: Caleffi
  • Media: Water/Glycol
  • Nominal Size: 1/2 in
  • Series: 553
  • Softgoods Material: NBR Seal
  • Features and More


  • Anti-scale with visual system pressure indicator
  • Automatic fast-filling - Fast fills the system to set pressure then automatically shuts off the water feed, no levers to flip or valves to close
  • Maintains stable pressure at pre-setting - Fill the system to a set pressure and maintain that pressure setting regardless of inlet pressure variations
  • Anti-scale polymer materials - Prevents scaling on internal sliding surfaces, assuring stable pressure control and long operating life
  • Built-in shut-off valve and check valve - Allows isolation of system from supply and check valve prevents loss of system pressure if the supply water drops below system pressure
  • Pre-calibration - Before charging the system, use a screwdriver to turn dial to intended system pressure, downstream pressure gauge is not required


  • Manual Shut-Off Valve
  • Strainer
  • Check Valve and 0 to 60 psi Pressure Gauge


  • ASSE 1012
  • CSA B64.3
  • FM 21654
  • ICIM Certified
  • ISO 9001


  • 2 Years