Dayco 87301 HVAC Heater Hose

Dayco Small I.D. Heater Hose 87301

Dayco 87301 is a Small I.D. Heater Hose built for HVAC heater hose routing where a dual inside diameter is required. Made from EPDM and finished in black, it is specified for heater circuit connections that need 1/2 in. on one end and 5/8 in. on the other.

Compatible With Dodge B1500, B2500, B3500, Ram 1500, Ram 2500, Ram 3500 and Jeep Cherokee, Comanche, and Wagoneer applications listed below, this hose supports factory-style heater plumbing on vehicles with auxiliary heater setups and reservoir-to-valve routing. The Dayco 87301 part number is also a useful reference when matching replacement heater hose by size and application.

Key Features

• EPDM construction for heater hose service
• Dual I.D. hose design with 1/2 in. and 5/8 in. ends
• Black finish for a factory-style appearance
• Meets SAE J20R3 Class D-1 and SAE J1684 Type EC specifications
• Small I.D. Heater Hose line for select HVAC routing needs
• Dayco 87301 replacement reference for fitment matching

Product Details

The Dayco Small I.D. Heater Hose line is focused on applications that require a smaller inside diameter and a dual-size connection. This hose is intended for heater circuit use where the vehicle’s original routing calls for a pipe-to-tee, pipe-to-tee-1, pipe-to-tee-2, valve-to-reservoir, or auxiliary heater pipe-to-tee connection. For Dodge and Jeep platforms, the Dayco 87301 helps match the original hose layout and size requirements without changing the factory plumbing path.

This part cross-references Gates 18051 for the same application.

Vehicle Fitment

• Fits 1996 Dodge B1500, Pipe To Tee, w/Aux. Heater; Small I.D. Heater Hose
• Fits 1995-1996 Dodge B1500, Pipe To Tee, Small I.D. Heater Hose
• Fits 1996 Dodge B2500, Pipe To Tee, w/Aux. Heater; Small I.D. Heater Hose
• Fits 1995-1996 Dodge B2500, Pipe To Tee, Small I.D. Heater Hose
• Fits 1995-1996 Dodge B3500, Pipe To Tee, Small I.D. Heater Hose
• Fits 1995 Dodge Ram 1500, Pipe To Tee, w/Aux. Heater; Small I.D. Heater Hose
• Fits 1995 Dodge Ram 1500, Pipe To Tee, Small I.D. Heater Hose
• Fits 1995 Dodge Ram 2500, Pipe To Tee, Small I.D. Heater Hose
• Fits 1988-1994 Dodge B150, Pipe To Tee, w/Aux. Heater; Small I.D. Heater Hose
• Fits 1988-1994 Dodge B250, Pipe To Tee, w/Aux. Heater; Small I.D. Heater Hose
• Fits 1994 Dodge B350, Pipe To Tee, w/Aux. Heater; Small I.D. Heater Hose
• Fits 1988-1989 Dodge B350, Pipe To Tee, w/Aux. Heater; Small I.D. Heater Hose
• Fits 1994 Dodge Ram 1500, Pipe To Tee, w/A.C., w/Aux. Heater; Small I.D. Heater Hose
• Fits 1994 Dodge Ram 2500, Pipe To Tee, w/A.C., w/Aux. Heater; Small I.D. Heater Hose
• Fits 1994 Dodge Ram 3500, Pipe To Tee, w/A.C., w/Aux. Heater; Small I.D. Heater Hose
• Fits 1991-1993 Dodge B150, Pipe-1 To Tee-1, w/Aux. Heater; Small I.D. Heater Hose
• Fits 1991-1993 Dodge B250, Pipe-1 To Tee-1, w/Aux. Heater; Small I.D. Heater Hose
• Fits 1990-1993 Dodge B250, Pipe-2 To Tee-2, w/Aux. Heater, w/A.C.; Small I.D. Heater Hose
• Fits 1991-1993 Dodge B350, Pipe-1 To Tee-1, w/Aux. Heater; Small I.D. Heater Hose
• Fits 1990-1993 Dodge B350, Pipe-2 To Tee-2, w/Aux. Heater, w/A.C.; Small I.D. Heater Hose
• Fits 1990 Dodge B150, Pipe-2 To Tee-2, w/Aux. Heater, w/A.C.; Small I.D. Heater Hose
• Fits 1987-1990 Jeep Cherokee, Valve To Reservoir, Small I.D. Heater Hose
• Fits 1987-1990 Jeep Comanche, Valve To Reservoir, Small I.D. Heater Hose
• Fits 1987-1990 Jeep Wagoneer, Valve To Reservoir, Small I.D. Heater Hose
• Fits 1986-1987 Dodge B150, Auxiliary Heater Pipe To Tee, Small I.D. Heater Hose
• Fits 1986-1987 Dodge B250, Auxiliary Heater Pipe To Tee, Small I.D. Heater Hose
• Fits 1986-1987 Dodge B350, Auxiliary Heater Pipe To Tee, Small I.D. Heater Hose

Installation Notes

Verify the original hose routing, end diameters, and connection points before installation. This hose is used in heater hose circuits with specific pipe-to-tee and valve-to-reservoir layouts, so matching the vehicle’s factory configuration is important. Confirm that the replacement path follows the same routing as the original Dayco 87301 application.

Quality Assurance

Dayco heater hose products are built to SAE J20R3 Class D-1 and SAE J1684 Type EC specifications, supporting consistent material and performance standards for HVAC hose service. The EPDM construction is selected for heater system use in the listed Dodge and Jeep applications.