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Molded By-Pass and Heater Hose

Not for use in fuel or oil transfer applications.

Original configurations available to assure proper fit. See the automotive and heavy-duty truck applications guides for application and part number assistance.

Designed to transfer glycol-based coolants to and from the heater core, by-pass to the radiator, as well as through other components in the vehicle’s coolant system.

  • Resistant to Electrochemical Degradation (ECR).
  • Compatible with most coolants including ethylene glycol and propylene glycol-based coolants, as well as organic acid modified, Long Life coolants.
  • ID Range of 1/4" to 1-3/8" and includes intersect hose configurations.



Cover with synthetic knit reinforcement
Temperature Range -40°F to +275°F (-40°C to +135°C)
SAE Specification SAE 20R3EC Class D1 and Class D2
Specifications many original equipment specifications

Further Information