Gates 18535 Small I.D. Molded Heater Hose

The Gates 18535 is a small-diameter molded heater hose engineered for reliable coolant transfer in automotive heating systems. Designed to match OE specifications, this hose delivers a precise, leak-free fit right out of the box — eliminating the guesswork of trimming bulk hose.

Key Features:

• EPDM construction — tube, synthetic fiber knit reinforcement, and cover resist electrochemical degradation (ECD), the leading cause of heater hose failure
• Molded to OE specifications — factory-quality connections for a secure, drip-free seal
• Meets SAE 20R3 Type EC Class D-1 and D-2 specifications for dependable performance
• Temperature rated from -40°F to +275°F (-40°C to +135°C)
• Unaffected by most coolants, non-oil-based coolant additives, and high cooling system pressures
• Resists water permeation through the hose wall and cover

Important: Gates recommends replacing hose clamps each time a new coolant hose is installed. Not intended for fuel or oil transfer applications.

Gates has been a trusted name in automotive hose manufacturing for over a century, working alongside major OEMs worldwide to develop parts built to last. The 18535 delivers that same OE-level quality in an aftermarket-friendly package.