Model Number

• Cartridge Only (118)
• CSR1 (20)
• CSR2 (12)
• CSR3 (12)
• CSR4 (12)
• CSRH1 (14)
• CSRH2 (12)
• CSRH3 (14)
• CSRH4 (14)
• CSRH5 (10)

Inlet Connection

• 1/2 in (58)
• 3/4 in (38)
• 1 in (14)
• 1-1/4 in (10)

Outlet Connection

• 3/4 in (34)
• 1 in (38)
• 1-1/4 in (26)
• 1-1/2 in (22)

Pressure Relief Setting

• 150PSIG (36)
• 175PSIG (8)
• 200PSIG (36)
• 220PSIG (4)
• 225PSIG (8)
• 250PSIG (38)
• 275PSIG (4)
• 300PSIG (36)
• 350PSIG (36)
• 380PSIG (4)
• 400PSIG (28)

Single/Dual

• Dual (60)
• Single (60)

Brands

• Parker RS (238)