Gates 12506 HVAC Heater Hose - Reservoir To Water Pump

Gates Molded Heater Hose 12506 Overview

The Gates 12506 molded heater hose is an OEM-style coolant hose built for tight engine bays and factory routing. It is formed to match the small-diameter layout used on select vehicles, including the 2017-2019 Chevrolet Bolt EV reservoir to water pump connection.

Made from EPDM, this Gates Molded Heater Hose is suited for coolant, water, and air service, and it is also approved for marine applications. The molded shape helps maintain the intended hose path in compact spaces where straight hose sections are not a direct replacement.

Key Features

• Gates Molded Heater Hose, part number 12506
• Factory-molded, OE-style shape for tighter engine compartments
• EPDM construction for coolant, water, and air applications
• Small I.D. design with 19 mm / 0.75 in. ends
• Centerline length: 434 mm / 17.1 in.
• Approved for marine applications
• Compatible with 2017-2019 Chevrolet Bolt EV reservoir to water pump routing

Product Details

Gates 12506 is a molded heater hose from the Gates Molded Heater Hose line, a product family focused on OE-style hose routing for modern vehicles with limited underhood space. The molded profile supports the original hose path on the Chevrolet Bolt EV, helping maintain proper routing between the reservoir and water pump. If you are sourcing a replacement for a 2017, 2018, or 2019 Chevrolet Bolt EV, this hose matches the listed application and dimensions.

This part cross-references Carlson 13506 for the same application.

Common Replacement Uses

• Replacing a cracked or aged reservoir-to-water-pump heater hose
• Restoring coolant flow in a compact EV cooling circuit
• Addressing leaks at a molded hose section with the correct OE-style bend
• Replacing a hose that no longer holds its original routing in a tight engine compartment

Installation Notes and Tips

Verify the hose path, end diameters, and centerline length before installation. On the Chevrolet Bolt EV, confirm the reservoir to water pump routing matches the listed position and inspect adjoining fittings for wear, corrosion, or residue that could affect sealing. Transfer the hose along the original molded path to avoid kinks or stress at the connections.

Quality Assurance

Gates manufactures this molded heater hose as an OE-style replacement built to the listed dimensions and application. The EPDM construction and factory-molded shape support consistent fitment for the specified Chevrolet Bolt EV cooling system routing.