Dayco 87720 HVAC Heater Hose

Overview

Dayco 87720 is a small I.D. heater hose built for heater circuit routing where a dual inside-diameter design is required. It uses EPDM construction and follows SAE J20R3 Class D-1 and SAE J1684 Type EC specifications for heater hose applications.

Compatible With Honda Prelude, Chrysler Town & Country, Dodge Caravan, Dodge Grand Caravan, Plymouth Grand Voyager, Plymouth Voyager, Chrysler Daytona, and Dodge Daytona applications listed below. This hose is identified by part number 87720 and is intended for fitments that call for a 5/8 in. to 3/4 in. dual I.D. hose.

Key Features

• EPDM rubber construction for heater hose service
• Dual I.D. design with 5/8 in. and 3/4 in. ends
• Meets SAE J20R3 Class D-1 and SAE J1684 Type EC requirements
• Black finish for a clean engine-bay appearance
• Dayco 87720 small I.D. heater hose for specified HVAC routing

Detailed Description

Dayco 87720 is a replacement HVAC heater hose for vehicles that use small inside-diameter coolant routing between heater components, tees, pipes, valves, and the engine. The dual I.D. layout helps match different connection sizes without forcing an incorrect hose choice, and the EPDM material is suited to hot coolant service. For buyers searching for a heater hose for Honda Prelude or a heater hose for Chrysler and Dodge minivan applications, this part number 87720 covers the listed factory-style routing points.

The Dayco Small I.D. Heater Hose line focuses on application-specific hose sizing for heater circuits that need accurate diameter transitions. That makes it a practical choice when replacing a worn or leaking hose in systems that specify a 5/8 in. to 3/4 in. connection. Part number 87720 is also cross-referenced to Gates 18915 and 19150 for the same application.

What It Is Used For

• Replacing a cracked or softened heater hose
• Restoring coolant flow through heater circuit plumbing
• Addressing seepage at hose-to-pipe or hose-to-valve connections
• Matching dual-diameter heater hose routing specified by the vehicle
• Servicing HVAC coolant lines on listed Honda, Chrysler, Dodge, and Plymouth applications

Installation Notes and Tips

Verify the routing point, inside diameters, and vehicle notes before installation. Some listed applications require a protective sleeve, and certain fitments are specific to auxiliary-heater or air-conditioning configurations. Confirm that the hose path matches the original layout before trimming or routing the replacement.

Quality Assurance

Dayco 87720 is built to SAE J20R3 Class D-1 and SAE J1684 Type EC specifications, providing a standards-based replacement for heater hose service. The EPDM construction supports use in coolant-heater applications where temperature and fluid exposure are part of normal operation.