Single/Dual

• Single (144)

Model Number

• 850/851 Series (72)
• 850R/851R Series (72)

Inlet Connection

• 3/4" (48)
• 1" (48)
• 1-1/4" (48)

Pressure Relief Setting

• Custom (12)
• 150 PSI (12)
• 175 PSI (12)
• 200 PSI (12)
• 225 PSI (12)
• 250 PSI (12)
• 275 PSI (12)
• 300 PSI (12)
• 325 PSI (12)
• 350 PSI (12)
• 375 PSI (12)
• 400 PSI (12)

Valve Finish

• Anodized Aluminum (72)
• Ductile Iron (72)

Brands

• Cyrus Shank (144)