Parker's Series 6620 Silicone High Temperature Coolant Hose provides excellent service across a wide variety of coolants and multiple engine heater and radiator applications. The silicone construction resists chemicals, aging, cold leaks, cracking, delamination, heat, ozone and peeling to maximize performance. The hose is flexible for easy routing and installation, resists the elevated temperatures common to engine compartments and is available in long continuous lengths for maximum versatility.
• General Industrial
• Tube: Black silicone for superior heat resistance to 392°F.
• Reinforcement: Multiple textile plies for strength and kink resistance.
• Cover: Red silicone for superior temperature resistance and easy identification.
• Hot water
• Coolant transfer in heater and coolant circuits
• Agricultural equipment
• Construction equipment
• Off-road equipment
• SAE J20R1 Class A
• TMC RP303B
• Design Factor: 3:1
Hose Inner Tube Material
Material - Hose Reinforcement
Multiple High Temperature Textile Plies
Material - Cover
Minimum Working Temperature (F)
Maximum Working Temperature (F)
Minimum Working Temperature (C)
Maximum Working Temperature (C)
SAEJ20R1 Class A, ISO 1307-1997, TMC RP303B
Hose I.D. (inch)
5/8 to 2
Hose O.D. (inch)
0.95 to 2.40
0.15 to 0.61
Maximum Working Pressure (psi)
85 to 250
Maximum Working Pressure (bar)
5.86 to 17.24
Standard Pack Qty (ft)