EVIL ENERGY 5/8" Heater Hose Coolant Radiator 10ft Black — EPDM, 100 PSI Working, SAE 20R3

EVIL ENERGY 5/8" heater hose is a 10-foot, EPDM coolant hose engineered for radiator, overflow, and engine hot-water applications with a 100psi working pressure and SAE 20R3 compliance.

This heavy-duty hose is designed to replace factory radiator and heater lines or to serve as a durable repair part in cooling systems. Constructed from EPDM rubber and built to meet SAE 20R3 Standard Wall Class D-2, it balances flexibility, heat resistance, and long service life. It handles coolant, water, and antifreeze across a wide temperature range, making it a practical choice for automotive maintenance, boat engines, and industrial hot-water loops.

How robust is this hose for everyday engine cooling use?

The EVIL ENERGY heater hose offers reliable mechanical strength with a 100psi working pressure and a 300psi burst rating, so it withstands typical operating pressures plus occasional spikes. EPDM composition resists ozone, heat, and many coolant chemistries, extending service life compared with generic rubber lines.

• Working pressure: 100psi; burst pressure: 300psi
• Temperature range: -40°F to 257°F (-40°C to 125°C)
• Meets/exceeds SAE 20R3 Standard Wall Class D-2
• EPDM material resists heat, ozone, and common coolants

Will this hose fit my vehicle or service application?

The hose ID is 5/8" (16mm) with an outer diameter of 0.94" (24mm) and tolerances suitable for standard hose clamps and fittings. A 10-foot roll offers enough length for most heater cores, radiator feeds, or custom-routing needs and can be trimmed to exact lengths on site.

• Inner diameter: 5/8" (16mm) ±0.5mm
• Outer diameter: 0.94" (24mm) ±0.6mm
• Length: 10 feet — cuttable for custom fit
• Min bending radius: 128mm for proper routing

What fluids and conditions is this hose compatible with?

EVIL ENERGY's EPDM heater hose is formulated to handle coolant, water, and most antifreeze solutions commonly used in automotive and small-engine cooling systems. It is not intended for prolonged exposure to fuels, oils, or solvents that degrade EPDM; choose a different specification for fuel transfer.

• Compatible: coolant, water, antifreeze
• Not recommended: gasoline, diesel, engine oil, strong solvents
• Designed for hot-water and engine cooling environments
• Operates across -40°F to 257°F temperature window

How easy is it to install and maintain this hose?

Installation is straightforward: measure, cut to length, and secure with standard hose clamps or quick-connect fittings designed for 5/8" ID lines. Routine maintenance involves periodic inspection for wear, soft spots, or hardening and replacing the hose if signs of aging appear; the EPDM compound reduces maintenance frequency relative to lower-grade hoses.

• Cut-to-length roll for on-site trimming
• Compatible with common 5/8" clamps and fittings
• Inspect for cracks, bulges, or hardening during service
• Min bending radius helps avoid kinking during routing

Who this is for: Technicians, DIY mechanics, and fleet managers who need a dependable, cut-to-length heater or radiator hose for repairs and custom installations will find this product suitable. It’s ideal when you require a resilient EPDM line that meets SAE 20R3 standards, offers a broad temperature operating window, and provides clear size specs (5/8" ID, 10ft length) for precision fits in cars, light trucks, marine engines, and small industrial systems.