Flex Technologies HH-100-25 Silicone Heater Hose – 1" ID x 25 Foot Roll

Flex Technologies HH-100-25 silicone heater hose, 1.00 in inside diameter, sold as a 25-foot roll in blue. Polyester-reinforced silicone construction rated for −65°F to 350°F continuous service — built as a replacement for standard rubber heater hose where high underhood temperatures, ozone exposure, or oil splash shorten rubber hose life on heavy-duty trucks, buses, and stationary engines.

Signs You Need New Heater Hose

• Visible cracks, splits, or pinholes along the run
• Soft, swollen, or oil-saturated rubber that compresses under finger pressure
• Coolant weeping at clamps or leaks at the heater core / cab pass-through
• Hose hardened and brittle, especially after years of heat soak

Specifications

Applications

This silicone heater hose is used for coolant and heater-line bulk runs in:

• Heavy-duty trucks (Freightliner, Kenworth, Peterbilt, International, Volvo, Mack)
• School buses and transit buses with extended heater-hose runs
• Marine, agricultural, construction, and stationary diesel engines
• Industrial machinery and back-of-cab heater plumbing

Cut hose clean and square at installation. Use silicone-rated worm-gear or T-bolt clamps; standard worm-gear clamps will eventually cut into silicone. Verify inside diameter and length match your application before ordering.