EVIL ENERGY 1/2" Heater Hose 10ft — EPDM Coolant Radiator Hose 100 PSI, SAE 20R3

This heavy-duty heater hose combines EPDM rubber construction with precise dimensional tolerances to connect radiators, heater cores, and overflow reservoirs. With a half-inch (13 mm) inner diameter, a 20 mm outer diameter and 10 feet of continuous length, the hose is suitable for replacement and custom routing in passenger vehicles, light trucks, and small engine applications. It meets SAE 20R3 Standard Wall Class D-2 requirements and is rated for a wide temperature range and high burst resistance, giving installers confidence when working with coolant, water, and antifreeze.

How does this hose stand up to engine temperatures and pressure?

The EVIL ENERGY heater hose uses EPDM rubber that tolerates a broad temperature span and resists common coolant chemistry. It is engineered for everyday under-hood conditions where heat cycling and pressure changes occur.

• Working pressure: 100 psi for continuous service.
• Burst pressure: 300 psi for safety margin under extreme conditions.
• Temperature range: -40°F to 257°F to handle winter starts and hot cooling systems.
• Meets SAE 20R3 Standard Wall Class D-2 for appropriate wall thickness and durability.

What are the exact dimensions and flexibility details?

Dimensions are specified with small tolerances so the hose fits clamps and fittings predictably. Its bend radius and wall construction make it easy to route through tight engine bays without kinking.

• Inner diameter: 1/2" (13 mm) with ±0.5 mm tolerance for snug fits.
• Outer diameter: 0.78" (20 mm) with ±0.8 mm tolerance for clamp sizing.
• Length: 10 feet (single continuous piece) for flexible routing and multiple runs.
• Minimum bending radius: 104 mm to prevent collapse when routed around tight corners.

Which fluids and applications is this hose compatible with?

This hose is formulated to be compatible with the most common cooling system fluids and typical heater system uses. It is not intended for fuels, oil-immersed applications, or pressurized hydraulic fluid lines unless specified by the vehicle maker.

• Compatible with coolant, water, antifreeze, and similar engine-cooling media.
• Common uses: heater core lines, radiator-to-overflow connections, hot-water heater plumbing, and general coolant routing.
• Not rated for fuel, engine oil, or most hydraulic fluids—consult specifications for those uses.

How durable and serviceable is the EVIL ENERGY heater hose?

The hose balances flexibility with reinforced EPDM rubber to resist ozone, heat aging, and coolant exposure. Its construction delivers extended service life when installed with correct clamps and routed away from sharp edges and extreme exhaust contact.

• Material: EPDM rubber known for heat and ozone resistance in coolant applications.
• Service life enhanced by proper clamp selection and clean mating surfaces during installation.
• Use recommended hose clamps and avoid contact with rotating parts or exhaust manifolds.

Who is this for: Technicians, DIY mechanics, fleet maintenance shops, and hobbyists who need a reliable, SAE-compliant 1/2" heater hose for coolant and heater system repairs or custom plumbing. If you require a 10-foot continuous EPDM hose rated to 100 psi with a broad temperature range and SAE 20R3 compliance, this EVIL ENERGY hose is designed to provide predictable fit and long-term performance when installed correctly.