Close this search box.


The AL-425 diaphragm meter is ideally suited for larger residential or small commercial/industrial installations.  Compatible with automatic meter reading technology. It is unequaled for accuracy retention and for life cycle maintenance economies.


  • Die-cast aluminum case
  • Oil-impregnated, self-lubricating bushings
  • Molded, convoluted diaphragms for smooth operation and long life
  • Rigid, reinforced flag rods for positive alignment and sustained accuracy
  • Graphite-filled phenolic valves to minimize wear
  • Long-life, low friction, grommet seals
  • Single coat polyester primer with high solids polyurethane top coat
  • Security seals that indicate tampering


  • Temperature compensation available from -30°F to 140°F (-34°C to 60°C)
  • 425 SCFH (12.0 m3/h) (0.60 specific gravity gas) at 1/2-inch W.C. differential
  • AMI/AMR compatibility
  • Meets ANSI B109.1 specifications
  • Measurement Canada accredited