Reduced Pressure Zone Valves



The Apollo MODEL 4AE Reduced Pressure Principle Backflow Preventers consist of two independently acting, TriForceTM centre stem guided check valves with a differential pressure relief valve located between the check valves. The unit is designed to give maximum protection against backflow of health or non-health hazard fluids by either back-pressure or back-siphonage. The durable epoxy coated ductile iron valves are easily maintained in the line without any special tools. The TriForceTM check valves operate with a spring assist in the flowing condition to provide excellent flow rates which are documented by ASSE or USC FCCC&HR approval curves. Table E Flange. 

Watermark Schedule

RPZ 65mm - 250mm Technical Data Sheet

Complete with butterfly and strainer

Product Codes

ARP65 - 4AE 65mm Table E Flange

ARP80 - 4AE 80mm Table E Flange

ARP100 - 4AE 100mm Table E Flange

ARP150 - 4AE 150mm Table E Flange

ARP200 - 4AE 200mm Table E Flange

ARP250 - 4AE 250mm Table E Flange 


  • Maximum protection against backpressure/ back-siphonage
  • Easy maintenance - no special tools required
  • Snap-in check retainers; 65-150mm
  • Bolted-in checks: 200 - 250mm
  • Low head loss
  • Stem guided TriForce™ check valves
  • Corrosion resistant
  • Maximum pressure 1,200kPa
  • Horizontal installation only
  • Operating temp. range 1°C - 60°C
  • AS2845.1 approved
  • Designed, manufactured, assembled and tested in South Carolina, USA
  • 5 year warranty