EVIL ENERGY 5/8" Heater Hose 50FT EPDM Coolant Radiator Hose — SAE 20R3, 100 psi Working

This heavy-duty heater hose delivers a long, flexible run of EPDM rubber tubing specifically designed for coolant, antifreeze, and hot water circulation in automotive and small engine systems. Built to withstand wide temperatures and resist common automotive fluids, it provides a reliable replacement or custom-length line for heater cores, radiator overflow connections, and other cooling plumbing tasks.

How will this hose handle engine temperatures and seasonal extremes?

The hose is formulated from EPDM rubber, a material chosen for heat, ozone, and weather resistance. It operates across a broad range so it stays flexible in cold starts and resists deformation at high under-hood temperatures.

• Temperature range: -40°F to 257°F (-40°C to 125°C)
• EPDM construction for thermal and ozone resistance
• Maintains flexibility at low temperatures and structural integrity at high heat

Is this hose strong enough for typical cooling system pressures?

Yes — the hose is rated with a conservative working pressure and a significantly higher burst pressure for safety. It was manufactured to meet the SAE 20R3 standard wall requirements, so it’s suitable for most automotive and light-truck cooling circuits.

• Working pressure: 100 psi for continuous operation
• Burst pressure: 300 psi for pressure spike protection
• SAE 20R3 (Class D-2) compliance for wall construction and performance

What sizes, tolerances, and installation considerations should I know?

This product provides a clear, measurable profile so you can plan fittings and clamps accurately. The inside and outside dimensions include small manufacturing tolerances; allow for these when matching hose to barbs, elbows, and reservoir fittings.

• Inner diameter: 5/8" (16 mm) with ±0.5 mm tolerance
• Outer diameter: 0.94" (24 mm) with ±0.6 mm tolerance
• Length: 50 feet of continuous hose for long runs or multiple shorter cuts
• Minimum bending radius: 128 mm — avoid sharp bends and kinks during routing

Which fluids and applications are compatible with this tubing?

The EPDM compound is compatible with a range of cooling-related media common to vehicles and heating systems. It’s intended for fluid transport in heater cores, radiator connections, overflow lines, and similar low-pressure coolant tasks.

• Compatible media: coolant, water, and standard automotive antifreeze mixtures
• Suitable uses: hot water heaters, engine cooling circuits, radiator-to-reservoir connections
• Not intended for fuels, strong solvents, or pressurized hydraulic fluids

Who is this for? Technicians, home mechanics, fleet managers, and DIY enthusiasts who need a dependable, long run of heater hose will find this product useful. Its 50-foot length allows repairs, custom routing, or stocking for multiple vehicles, while the SAE-rated construction and EPDM chemistry give confidence for use in everyday cooling and heater plumbing scenarios.