EVIL ENERGY 5/8" Heater Hose Coolant Radiator 20ft – SAE 20R3 EPDM, 100 PSI Working

EVIL ENERGY 5/8" heater hose is a 20-foot EPDM coolant line built to SAE 20R3 standards, delivering 100 PSI working pressure and wide temperature tolerance for radiator, heater core, and overflow connections.

This high-performance hose is engineered for vehicle cooling systems and hot water heater loops that demand durable, heat-resistant tubing. Constructed from EPDM rubber, it offers long service life, chemical compatibility with antifreeze and water, and a flexible profile that simplifies routing in tight engine bays. The hose meets stringent wall and pressure specifications to ensure dependable service in everyday driving and light-duty industrial uses.

How does this hose handle engine heat and pressure?

The EVIL ENERGY hose is rated for a 100 PSI working pressure and a 300 PSI burst threshold, allowing it to withstand the pressures commonly found in automotive cooling circuits. Its EPDM compound resists swelling and hardening across a broad temperature span so it remains flexible when hot or cold.

• Working pressure: 100 PSI; burst: 300 PSI
• Temperature range: -40°F to 257°F for cold-starts and high-heat operation
• Meets/exceeds SAE 20R3 Standard Wall Class D-2 for durability

Will this fit my vehicle's heater and radiator connections?

The inner diameter measures 5/8" (16 mm) with a manufacturing tolerance of ±0.5 mm, making it compatible with standard 5/8" hose fittings and clamps. The outside diameter is approximately 0.94" (24 mm) with ±0.6 mm tolerance, which helps you confirm clearance and clamp selection.

• ID: 5/8" (16 mm) ±0.5 mm
• OD: 0.94" (24 mm) ±0.6 mm
• Length: 20 feet for multiple runs or spares

How flexible and easy to install is the tubing?

This hose is designed with a practical minimum bending radius to ease routing around engine components and heater cores. EPDM construction maintains flexibility in cold weather and resists kinking under normal installation conditions, reducing installation frustration and leak risk.

• Minimum bending radius: 128 mm to prevent pinching
• EPDM material stays pliable in low temperatures
• Smooth interior aids coolant flow and clamp sealing

What fluids and applications are compatible with this hose?

The hose is formulated to be compatible with coolant mixtures, antifreeze, and water, making it suitable for heater cores, radiator lines, and overflow reservoir connections. It’s also usable in domestic hot water heater loops and similar low-pressure fluid circuits.

• Compatible media: coolant, antifreeze, water
• Common uses: heater hoses, radiator-to-overflow, hot water heater lines
• Intended for automotive and light industrial applications

Who is this for: Mechanics, DIY enthusiasts, fleet maintainers, and small shops that need a reliable, SAE-compliant 5/8" heater hose for cooling and hot-water circuits. Choose this 20-foot EVIL ENERGY hose when you want an EPDM line that balances flexibility, pressure tolerance, and wide temperature capability for routine maintenance, repairs, or custom routing projects.