Potter Roemer 4059 non-adjustable Reg-U-Matic pressure regulating valve

Potter Roemer 4059 Valve
BrandPotter Roemer
Model Code 4059
Model Info

Used downstream from a pressure regulating valve to protect system components from high pressure surges. This cast brass valve with 3/4"/1.9cm NPT male inlet X 3/4"/1.9cm NPT female outlet is adjustable/fixed and can be set at 15 PSI through 175 PSI/1 through 12 bars.


  • Automatic Fire Sprinkler System Pressure Relief Valve
  • Hydraulic piston design
  • Tamper Proof Pressures
  • Selected pressure control under residual and static conditions
  • Selected pressure control for 20 to 400 PSI/1.3 to 27.5 bars
  • Valve opens fully under low residual supply pressure
  • Monitor Switch Adapter to provide valve supervision

Additional Features:

  •  Maximum back pressure does not damage valve components
  • Listed by Underwriters Laboratories as a checking device
  • Listed by Underwriters Laboratories up to 400 PSI/27.5 bars pressure
  • Complete piping system can be hydrostatically tested to 400 PSI/27.5bars without damage to valve
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