EVIL ENERGY 3/4" Heater Hose Coolant Radiator 10ft Black — 100 PSI EPDM, SAE 20R3

EVIL ENERGY 3/4" heater hose is a 10-foot EPDM coolant line built to SAE 20R3 standards, rated for 100 psi working pressure and designed for engine cooling, heater cores, and overflow connections.

This heavy-duty heater hose combines EPDM rubber resilience with factory-grade dimensions for reliable coolant transfer in passenger vehicles, trucks, marine engines, and other systems that circulate water, antifreeze, or coolant. With a 3/4" (19 mm) inner diameter, a durable outer diameter, and a broad temperature range, it fits common OEM and replacement needs while meeting SAE 20R3 (Class D-2) performance requirements.

What operating conditions can the hose tolerate?

The hose is engineered for a wide service envelope: it operates from -40°F up to 257°F and sustains a working pressure of 100 psi with a 300 psi burst threshold. These limits make it suitable for both cold starts and high-heat cooling circuits without rapid degradation.

• Temperature range: -40°F to 257°F for broad climate compatibility
• Working pressure: 100 psi for routine cooling system loads
• Burst pressure: 300 psi as a safety margin under transient spikes
• Min bending radius: 152 mm to prevent kinking during installation

How does the hose’s construction affect durability and fit?

Manufactured from EPDM rubber, the hose resists ozone, heat aging, and coolant chemicals better than many general-purpose rubbers. Dimensional tolerances keep fittings snug: 3/4" (19 mm) nominal ID with ±0.6 mm tolerance and 1.10" (28 mm) OD with ±0.8 mm tolerance for consistent clamping and leak-free joints.

• Material: EPDM rubber for chemical and heat resistance
• ID tolerance: ±0.6 mm to ensure proper hose clamp grip
• OD tolerance: ±0.8 mm for predictable routing and clearance
• Complies with SAE 20R3 Standard Wall Class D-2 specifications

What fluids and applications is this hose compatible with?

The hose is formulated for coolant systems and is compatible with water, antifreeze, and most engine coolants. Typical uses include heater core lines, radiator connections, overflow reservoir runs, and other low-to-medium pressure cooling circuits in automotive and marine environments.

• Compatible media: coolant, water, antifreeze, and similar fluids
• Common applications: heater hoses, radiator feed/return, overflow lines
• Length: 10 feet for routing flexibility and trimming to size
• Suitable for passenger vehicles, light trucks, and many marine setups

How easy is it to install and maintain?

The 10-foot length provides enough material to cut custom runs while maintaining standard sizing for clamps and fittings. EPDM construction requires simple visual inspections; replace if you see cracking, soft spots, or hose collapse. Keep clamps tightened to manufacturer torque and avoid over-bending to preserve service life.

• Length: 10 ft ready to trim for custom installation
• Min bend radius: 152 mm to reduce kinking during routing
• Maintenance: periodic visual checks for wear and secure clamps
• Installation: standard hose clamps and barbed/fitted connectors

Who is this for: EVIL ENERGY 3/4" Heater Hose is aimed at mechanics, DIY car owners, fleet maintenance teams, and marine technicians who need a dependable, standardized coolant hose. It suits anyone replacing heater or radiator lines who wants a consistent, SAE-compliant EPDM option with a practical 10-foot length for flexible routing and secure, leak-resistant connections.