EVIL ENERGY 5/8" Heater Hose 5FT — EPDM Coolant Radiator Line, 100 PSI Working Pressure

EVIL ENERGY 5/8" Heater Hose is a 5-foot EPDM coolant line built to SAE 20R3 standards, rated for 100 PSI working pressure and designed for radiator, heater core, and overflow reservoir connections.

This 5-foot heater hose from EVIL ENERGY is a purpose-made replacement hose for automotive cooling systems and hot-water heater connections. Constructed from durable EPDM rubber, it balances flexibility in cold conditions with heat resistance for high-temperature use. The hose meets SAE 20R3 Standard Wall Class D-2 requirements and is specified for common engine coolant media like water, antifreeze, and coolant blends.

What are the hose dimensions and mechanical ratings?

The EVIL ENERGY heater hose measures 5/8" (16 mm) inside diameter with an overall outside diameter of 0.94" (24 mm) and comes in a 5-foot length. Manufacturing tolerances are ±0.5 mm for ID and ±0.6 mm for OD. Mechanically, it supports a 100 PSI working pressure and a 300 PSI burst pressure.

• Inside diameter: 5/8" (16 mm), tolerance ±0.5 mm
• Outside diameter: 0.94" (24 mm), tolerance ±0.6 mm
• Length: 5 feet (approx. 1.52 m)
• Working pressure 100 PSI; burst pressure 300 PSI

How does the material and temperature range affect performance?

Made from EPDM rubber, this hose resists heat, ozone, and many common coolants, which helps prevent premature cracking or hardening. Its wide operating temperature window allows reliable performance from freezing starts to hot engine conditions without significant stiffness or softening.

• Material: EPDM rubber for durability and chemical resistance
• Temperature range: -40°F to 257°F (-40°C to 125°C)
• Resists ozone and coolant-related degradation

Where and how is this hose typically used in vehicles and equipment?

This hose is suitable for heater cores, radiator inlet/outlet connections, and lines to the overflow reservoir. Its size and pressure rating make it appropriate for many passenger cars, light trucks, and small engine applications where a 5/8" coolant line is required.

• Heater core connections and bypass lines
• Radiator to overflow or reservoir connections
• General coolant and antifreeze circulation lines in light vehicles

How easy is it to install and maintain?

The hose’s 5-foot length offers enough material for cutting to fit custom runs, and EPDM’s flexibility simplifies routing through engine bays. Maintain by checking clamps and ends for leaks; replace if you notice cracking, soft spots, or excessive swelling where hose clamps contact the material.

• Cut-to-fit 5-foot length for custom installations
• Flexible EPDM simplifies routing and clamping
• Inspect clamps and ends periodically for leaks or wear

Who is this for: EVIL ENERGY’s 5/8" Heater Hose is intended for DIY mechanics, professional technicians, and equipment owners needing a reliable replacement coolant line that meets SAE 20R3 standards. It suits anyone who requires a durable EPDM hose for heater cores, radiator connections, or overflow reservoir lines in passenger vehicles, light trucks, small engines, or hot-water heater systems where a 5/8" ID, 5-foot length, and 100 PSI working pressure are appropriate.