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Flexfab KIT5003D heater hose repair kit hose and clamp kit

Flexfab 5515-175, 1.75" x 3 ft, 3-Ply Blue Silicone Coolant Hose, 44mm

by Flexfab
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$ 85.39
$ 85.39 - $ 85.39
$ 85.39
$ 68.29
$ 68.29 - $ 68.29
$ 68.29

A versatile heavy-duty coolant hose for diesel, automotive, marine, agricultural, and industrial cooling systems, the Flexfab 5515-175 is a 3-ply blue silicone hose built to resist hardening, cracking, cold leaks, and aging where ordinary rubber fails.

Why this Flexfab 3-ply coolant hose

  • 3-ply polyester reinforcement — 300 PSI actual burst, a wide margin over the ~100 PSI working pressure of most cooling systems.
  • −65°F to +350°F range — stays flexible in cold and handles under-hood heat without going brittle.
  • Meets SAE J20 R1 Class A & TMC RP303B Class I Grade II — documented spec-grade performance.
  • 1.75" (44mm) ID × 2.07" (53mm) OD — precise sizing for a clean clamp seal.
  • Resists oil splash, ozone, and direct sunlight — long service life in hostile engine environments.

Cut to a 3-foot stick, ready to install, and pairs with a Flexfab 2582-0028 clamp for a leak-free connection.

Backed by hpcouplers’ fast shipping and easy returns.

  • FlexFab Series: 5515
  • Part Number: 5515-175
  • Inside Diameter (ID): 1.75" (44mm)
  • Outside Diameter (OD): 2.07" (53mm)
  • Hose Length: 3 feet
  • Wall Thickness: .140" / .190"
  • Weight LB/FT: 0.56
  • Actual Burst Pressure - PSI: 300
  • SAE J20 R1 Class A - PSI: 225 PSI
  • TMC RP303B Class I Grade II - PSI: 125 PSI
  • Extreme temp range: -65F to +350F
  • Construction: Blue Silicone hose with 3-ply of Polyester reinforcement