EVIL ENERGY 5/8in Heater Hose 10ft EPDM with 10 Clamps — 100psi Black Reinforced Coolant Line

EVIL ENERGY 5/8" heater hose is a 10-foot EPDM coolant line, rated 100psi, supplied with 10 stainless-style clamps for radiator, overflow, and heater-box connections.

This reinforced EPDM hose is built for automotive cooling systems and household hot-water routing where a durable, temperature-resistant flexible line is needed. With an inner diameter of 5/8" (16mm), an outer diameter of 0.94" (24mm), and a full 10-foot length, it provides a ready-to-install solution for repairs, custom plumbing runs, or preventive maintenance. The hose meets SAE 20R3 / Wall Class D-2 expectations and is specified to withstand low temperatures down to -40°F and continuous exposure up to 257°F, making it suitable for coolant, water, and antifreeze applications.

What are the technical specs and construction details?

The EVIL ENERGY heater hose is manufactured from EPDM rubber with tolerances to assure fit and performance. It is designed to manage common automotive coolant fluids and household hot water without premature hardening or cracking.

• ID: 5/8" (16mm) with ±0.5mm tolerance
• OD: 0.94" (24mm) with ±0.6mm tolerance
• Length: 10 feet—single continuous run
• Material: EPDM rubber for heat and chemical resistance
• Working pressure: 100psi; burst pressure: 300psi
• Temperature range: -40°F to 257°F; min bending radius: 128mm

How will this hose perform in an engine cooling system?

Designed for cooling circuits, the hose handles coolant and antifreeze under typical engine conditions. Its pressure and temperature ratings accommodate everyday driving and stop-and-go traffic, while the EPDM compound resists common coolant chemicals.

• Suitable for radiator-to-overflow, heater core lines, and bypass runs
• 100psi working pressure supports most passenger vehicles and light trucks
• EPDM resists swelling and degradation from glycol-based fluids
• Flexible enough for tight routing with a minimum bend radius of 128mm

How does installation and sizing work for repairs or upgrades?

The hose’s 5/8" internal diameter fits many OEM heater and small coolant lines; measure existing fittings before cutting. The package includes ten clamps so you can secure multiple connections right away.

• Measure ID and OD at the connection points; confirm 5/8" inner diameter compatibility
• Cut to length with a sharp blade for clean ends and use included clamps for a tight seal
• Use hose routing that respects the 128mm minimum bend radius to avoid kinking
• Replace any old clamps or corroded connectors when installing new hose

What maintenance and longevity can I expect?

When installed correctly and kept free from oil contamination or abrasive contact, EPDM heater hoses like this one offer long service life. Periodic inspection for soft spots, bulges, or hardening helps catch problems before leaks occur.

• Inspect clamps and hose ends during routine servicing or coolant changes
• Check for cracks, bulges, or stiffening especially after heavy heat cycles
• Avoid contact with engine oil or fuel, which can degrade EPDM
• Replace hoses proactively if signs of wear appear—don’t wait for leaks

Who is this for? Mechanics, DIY enthusiasts, fleet managers, and homeowners who need a dependable, flexible coolant line will find this EVIL ENERGY hose useful. It’s ideal for vehicle heater-core repairs, radiator overflow connections, custom plumbing for small engines, and any application that requires a 5/8" ID EPDM hose with solid temperature and pressure ratings. The included clamps make it handy for multi-connection jobs and quick replacements, while the 10-foot length gives enough material for longer runs or multiple short replacements.