Gates 12104 HVAC Heater Hose - Valve To Pipe

Gates Molded Heater Hose for Ram 1500

The Gates 12104 molded heater hose is an OEM-style coolant hose built for tight engine compartments where a straight hose will not route correctly. It is formed to match factory routing and is suitable for coolant, water, and air service, with marine application approval.

For Ram 1500 and Ram 1500 Classic applications, this molded heater hose follows the valve-to-pipe path and uses EPDM construction for dependable heat and fluid resistance. The Gates Molded Heater Hose line focuses on factory-shaped replacement hoses that match the original routing needed in modern engine bays.

• Brand: Gates
• Part number: 12104
• OEM-style molded heater hose for factory routing
• EPDM material for heater and coolant service
• End I.D.: 0.75 in. / 19 mm at both ends
• Centerline length: 24.28 in. / 617 mm
• Molded design for tighter engine compartment fitment
• Approved for coolant, water, air, and marine applications

Detailed Product Description

Gates 12104 is a molded HVAC heater hose made for vehicles that require a shaped replacement rather than a universal hose. Its 0.75-inch inside diameter at both ends and 24.28-inch centerline length support factory-style routing from the valve to the pipe. This makes it a direct-fit style solution for 2013-2018 Ram 1500, 2020-2021 Ram 1500, and 2019-2021 Ram 1500 Classic valve-to-pipe applications. If you are searching for a Ram 1500 heater hose replacement or a molded coolant hose for Ram 1500 Classic, this part number 12104 matches the listed applications.

This part cross-references Bosch 13104 for the same application.

What It Helps Address

• Coolant hose routing issues in compact engine bays
• Replacement for a cracked, swollen, or leaking heater hose
• Factory-shaped fitment where a straight hose will not align correctly
• Valve-to-pipe heater circuit service on Ram 1500 and Ram 1500 Classic models
• Water, coolant, or air transfer needs in approved applications

Installation Notes and Tips

Verify the hose path, end diameters, and centerline length against the original part before installation. Confirm the valve-to-pipe routing on the vehicle and inspect adjoining clamps, fittings, and pipe surfaces for wear or corrosion before reassembly. Proper coolant system service should include checking for leaks after the engine reaches operating temperature.

Quality Assurance

Gates manufactures this molded heater hose as an OEM-style replacement with EPDM construction and factory-shaped dimensions for the listed Ram applications. The hose is approved for marine use in addition to coolant, water, and air service.