EVIL ENERGY 5/8" Silicone Heater Hose 10ft — SAE Class-A, 60 psi, -67°F to 356°F

EVIL ENERGY 5/8" silicone heater hose is a 10-foot, SAE J20R3 Class-A coolant and heater line designed for durable temperature resistance and reliable 60 psi working pressure.

This silicone heater hose combines braided polyester reinforcement with inner and outer silicone layers to deliver extended lifespan, wide temperature tolerance, and dependable performance for automotive and household heating systems. Engineered to meet SAE J20R3 Class-A criteria, the hose resists aging and high and low thermal extremes while carrying water, coolant, steam, and mild chemicals where a flexible, leak-resistant connection is required.

How hot or cold can the EVIL ENERGY heater hose handle?

The hose is rated for a broad operating range from -67°F to 356°F (-55°C to 180°C), enabling use in both freezing conditions and high-heat engine or heating environments. This thermal resilience helps prevent cracking, hardening, or softening under expected service temperatures.

• Temperature range: -67°F to 356°F (-55°C to 180°C)
• Suitable for engine bay heat and cold-weather starts
• Silicone composition reduces thermal degradation versus EPDM

What pressure and strength specs should I count on?

The hose carries a working pressure of 60 psi and a burst pressure measured at 246 psi, giving a safety margin for typical cooling and heater line applications. Reinforced braided polyester adds tensile strength and resists collapse under vacuum or flexing loads.

• Working pressure: 60 psi
• Burst pressure: 246 psi
• Minimum bend radius: 79.5 mm for correct installation

What are the size and material details I need before installing?

This straight hose has a 5/8-inch inner diameter (15.9 mm) with ID tolerance ±0.4 mm and a 15/16-inch outer diameter (23.9 mm) with OD tolerance ±0.4 mm. The 10-foot length provides plenty of routing options; silicone inner and outer layers with braided polyester reinforcement offer improved longevity and chemical resistance compared with standard rubber hoses.

• ID: 5/8" (15.9 mm) ±0.4 mm
• OD: 15/16" (23.9 mm) ±0.4 mm
• Length: 10 feet — cut-to-fit for custom runs

Where is this hose appropriate to use and where should it be avoided?

EVIL ENERGY silicone heater hose is suitable for water, coolant, steam, transport air, and weak acids or alkalis in heating and cooling circuits, household water heaters, and many automotive systems. It is not designed for fuels, alcohol blends, engine oil, or lubricants; avoid using it where direct contact with heavy hydrocarbons is expected.

• Recommended: automotive cooling, heater cores, water heaters, steam lines
• Not recommended: fuel, alcohol, engine oil, or lubricant lines
• Complies with SAE J20R3 Class-A standards for heater hose

Who is this for: Technicians, DIY mechanics, and home heating installers who need a flexible, long-lasting heater or coolant hose with proven temperature and pressure ratings will find this EVIL ENERGY 5/8" silicone hose well suited to their projects. It’s particularly useful when reliability in extreme temperatures and resistance to aging are priorities, and when a 10-foot run that can be trimmed to fit is required.