Description
Product Overview
The Gates Premium Molded Heater Hose is engineered to match OEM specifications and deliver superior performance in automotive air‑conditioning applications. Featuring an EPDM inner tube, synthetic fiber knit reinforcement, and an EPDM outer cover, the hose resists electrochemical degradation—the leading cause of hose failure. It complies with SAE 20R3 Type EC Class D‑1 and D‑2 standards and operates across a wide temperature range of -40°F to 275°F, making it suitable for both cold‑weather starts and high‑heat conditions.
Usage
Designed for replacement of factory heater and coolant hoses, this product fits seamlessly into most vehicle AC systems. Ideal for mechanics, DIY enthusiasts, and fleet maintenance teams, it can be installed in passenger cars, light trucks, and SUVs. Its machined exterior ensures a secure fit on clamps and connectors, while the flexible EPDM construction allows easy routing through tight engine bays.

Why Choose Us
Gates brings decades of expertise in fluid transfer solutions, guaranteeing that each hose meets rigorous quality standards. Our molded heater hose offers OEM‑level durability, resistance to corrosion, and consistent pressure handling, reducing the risk of leaks and costly repairs. Backed by a reputation for reliability, Gates provides peace of mind for both professional technicians and everyday drivers.
Key Features
- EPDM tube with synthetic fiber knit reinforcement for maximum durability
- Meets SAE 20R3 Type EC Class D‑1/D‑2 specifications
- Temperature range from -40°F to 275°F ensures performance in extreme climates
- Machined exterior for a secure, leak‑free fit on standard clamps
- Resists electrochemical degradation, extending service life
FAQ
What vehicles are compatible with this heater hose?
The hose is designed to replace OEM heater hoses in most passenger cars, light trucks, and SUVs that use SAE 20R3 Type EC specifications.
Can I install this hose myself?
Yes, the hose features a machined exterior that fits standard clamps and connectors, making DIY installation straightforward for those with basic mechanical skills.
What is the warranty on this product?
Gates offers a limited warranty covering manufacturing defects for a period of one year from the date of purchase.
How does this hose resist corrosion?
The EPDM construction and synthetic fiber reinforcement protect against electrochemical degradation, the primary cause of hose failure in cooling systems.
Is this hose suitable for high‑performance applications?
Yes, its wide temperature tolerance and compliance with SAE standards make it appropriate for both standard and high‑performance vehicle cooling systems.





Gates Premium Molded Heater Hose for Automotive
Gates Premium Molded Heater Hose for Automotive
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