Model Number

• SR1 (27)
• SR1R (14)
• SR2 (20)
• SR3 (22)
• SR4 (18)
• SRH1 (32)
• SRH2 (25)
• SRH3 (36)
• SRH4 (24)
• SRH5 (26)

Inlet Connection

• 1/2 in (118)
• 3/4 in (76)
• 1 in (24)
• 1-1/4 in (26)

Outlet Connection

• 3/4 in (73)
• 1 in (81)
• 1-1/2 in (42)
• 1-1/4 in (46)
• 2 in (2)

Pressure Relief Setting

• 150PSI (18)
• 250PSI (22)
• 300PSI (18)
• 400PSI (16)
• 160PSI (2)
• 165PSI (2)
• 175PSI (18)
• 180PSI (12)
• 185PSI (2)
• 190PSI (4)
• 200PSI (20)
• 214PSI (2)
• 225PSI (14)
• 230PSI (4)
• 235PSI (10)
• 255PSI (4)
• 260PSI (4)
• 265PSI (8)
• 275PSI (18)
• 280PSI (2)
• 290PSI (2)
• 325PSI (10)
• 340PSI (2)
• 348PSI (2)
• 350PSI (20)
• 362PSI (2)
• 375PSI (6)

Single/Dual

• Dual (124)
• Single (120)