EVIL ENERGY 3/4" Heater Hose 10 ft EPDM 100 PSI - Radiator & Heater Coolant Line, SAE-Rated

EVIL ENERGY 3/4" heater hose is a 10-foot EPDM coolant hose rated to 100 psi and built for engine cooling, heater, and overflow reservoir connections.

This 3/4" (19 mm ID) heater hose from EVIL ENERGY is engineered for automotive cooling system use, offering a blend of durability and flex across a wide temperature range. Constructed of EPDM rubber and built to exceed SAE 20R3 Standard Wall Class D-2 requirements, the hose handles coolant, water, and antifreeze while tolerating temperatures from -40°F up to 257°F. With a working pressure of 100 psi and a burst rating of 300 psi, it is suitable for heater cores, radiator connections, and overflow lines where reliable fluid transfer and resistance to heat and aging are essential.

How does this hose perform under heat and pressure?

The EVIL ENERGY heater hose is designed for consistent performance in typical engine compartments. EPDM compound resists heat, ozone, and coolant chemicals while the hose wall meets stringent SAE standards to reduce risk of failure under pressure. Tested specifications give a practical balance of flexibility and strength for everyday automotive conditions.

• Working pressure: 100 psi for routine system loads.
• Burst pressure: 300 psi for safety margin under spikes.
• Temperature tolerance: -40°F to 257°F for cold starts and hot operation.
• Meets/exceeds SAE 20R3 Standard Wall Class D-2 requirements.

What sizes and dimensions should I expect for fitment?

This hose is specified with clear internal and external dimensions to help you confirm compatibility. The internal diameter is 3/4" (19 mm) with a manufacturing tolerance, and the outer diameter and minimum bending radius provide guidance for routing in tight engine bays. Because length and diameter are precise, the hose works well for replacing existing 3/4" lines or for custom runs up to 10 feet.

• Internal diameter: 3/4" (19 mm) ±0.6 mm tolerance.
• Outer diameter: 1.10" (28 mm) ±0.8 mm tolerance.
• Length: 10 ft (3.05 m) continuous hose for multiple cuts.
• Minimum bending radius: 152 mm to avoid kinking.

Which fluids and applications are appropriate for this hose?

Because the hose is EPDM and SAE-compliant, it works with a broad range of non-fuel automotive fluids used in cooling and heating circuits. It is intended for coolant and antifreeze circulation, heater core lines, radiator to overflow plumbing, and similar low- to mid-pressure coolant duties. Avoid use with petroleum-based fuels or where manufacturer specifications prohibit EPDM materials.

• Compatible with coolant, water, and antifreeze solutions.
• Common uses: heater cores, radiator connections, overflow reservoir lines.
• Not recommended for gasoline, diesel, or transmission fluids.
• Use clamps rated to system pressure for secure connections.

How should I install and maintain the hose for longevity?

Proper installation and periodic inspection extend service life: cut squarely, deburr ends, and secure with clamps sized to the 3/4" ID. Route the hose away from sharp edges and excessively hot surfaces; maintain the minimum bend radius to prevent stress. Routine checks for soft spots, leaks, or age-related cracking will catch issues before they cause coolant loss.

• Cut ends cleanly and fit with compatible clamps.
• Keep at or above 152 mm bend radius to avoid kinks.
• Inspect periodically for abrasion, swelling, or cracks.
• Replace if any softening or coolant seepage appears.

Who is this hose for? EVIL ENERGY's 3/4" heater hose is aimed at DIY mechanics, professional technicians, and fleet maintenance teams needing a dependable coolant line for heater cores, radiator-to-overflow connections, and general coolant routing. Its 10-foot length accommodates multiple cuts for several repairs or one longer run, while the EPDM construction and SAE-compliant wall make it a practical, cost-effective choice where coolant compatibility, temperature range, and pressure handling are required. If you need a universal, replaceable hose that balances flexibility, temperature resistance, and working pressure for automotive cooling systems, this product fits those requirements.