Precision Brand Vulco-Flex Coolant Hose Green Stripe 1.75in ID x 19in — Spiral‑Reinforced Heavy‑Duty

Gates 26611 Green Stripe Vulco-Flex is a heavy-duty, spiral-reinforced replacement coolant hose designed to match molded hose performance for trucks, buses and commercial equipment.

This flexible Vulco-Flex hose from Precision Brand provides an off-the-shelf alternative to hard-to-find molded radiator hoses. Engineered with an internal steel spiral and durable EPDM/neoprene construction, it resists kinking and electrochemical degradation while fitting medium-radius coolant runs. Its broad compatibility and rugged build make it useful for fleet maintenance and one-off repairs where a molded part isn’t available.

How does this hose replace molded radiator hose shapes?

The built-in spiral wire lets the hose bend to medium radii without collapsing, mimicking many molded contours. Because the hose vulcanizes with polyester fabric plies, it holds shape and maintains reliable sealing at clamps and connections.

• Spiral wire reinforcement supports curved runs without kinking.
• Polyester fabric-ply vulcanized into the structure for dimensional stability.
• Available length and diameter to substitute several molded part profiles.

What operating conditions and fluids is the Gates 26611 compatible with?

The hose uses an EPDM inner tube and neoprene cover that tolerate engine-cooling environments, ozone and heat within its rated range. It meets SAE 20R5 Type EC Class D-2 performance and is intended for coolant systems; it is not approved for fuel or continuous oil transfer.

• Temperature range: -40°F to +257°F (-40°C to +125°C).
• Resistant to heat, ozone and typical engine coolant formulations.
• Not for use in fuel or oil transfer applications—observe the CAUTION.

How durable is this hose and what failure modes does it address?

Gates designed the Vulco-Flex to resist electrochemical degradation—the leading cause of hose failure—by selecting materials and reinforcements that minimize internal corrosion and breakdown. The neoprene cover and EPDM tube extend service life under heavy-duty duty cycles and exposure to ozone and heat.

• EPDM tube reduces permeability and swelling from coolant exposure.
• Neoprene exterior protects against abrasion and ozone cracking.
• Spiral wire prevents collapse in bent sections, maintaining flow.

What sizes and installation notes should technicians keep in mind?

The Gates 26611 is sized 1 3/4" I.D. (1.75") and is supplied at 19" length, making it suitable for many medium-length coolant runs. Because it replaces shaped molded hoses, careful trimming and proper clamp placement are required to ensure leak-free connections.

• Nominal size: 1 3/4" inner diameter; length: 19".
• Trim cleanly; avoid sharp edges that can cut the hose ends.
• Position clamps on wire-supported sections and torque to manufacturer clamp spec.

Who is this for: Fleet managers, heavy-duty mechanics and commercial vehicle owners who need a robust, versatile replacement for molded radiator hoses will find the Gates 26611 Vulco-Flex valuable. It’s particularly useful when a specific molded part is unavailable or when a flexible, kink-resistant hose is preferred for medium-radius coolant runs on trucks, buses and industrial equipment.