EVIL ENERGY 5/8" Heater Hose 50 ft EPDM Coolant Line — 100 PSI, SAE 20R3 Durability

EVIL ENERGY 5/8" Heater Hose is a 50-foot EPDM coolant line rated to 100 PSI that connects radiators, heater cores, and overflow reservoirs for reliable engine cooling performance.

This heavy-duty hose is engineered for automotive coolant plumbing and household hot-water applications where durable, heat- and weather-resistant tubing is required. Built from EPDM rubber and manufactured to meet SAE 20R3 (Class D-2) expectations, the hose balances flexibility, pressure capacity, and long-term resistance to heat, ozone, and coolant blends. The line length and diameter make it easy to route in tight engine bays while still offering enough material for multiple runs or spare stock.

How does this hose withstand engine heat and outdoor conditions?

The hose uses EPDM compound chosen for heat, ozone, and weather resistance, which helps the material stay flexible and crack-resistant over time. Its rated temperature range covers extreme cold and sustained high temperatures commonly found in cooling systems.

• EPDM construction resists heat, ozone, and aging.
• Temperature range: -40°F to 257°F for broad operating conditions.
• Meets SAE 20R3 Standard Wall Class D-2 durability guidelines.

Will this hose handle common coolant system pressures?

Yes — the hose is designed for typical coolant system pressures and includes a safety margin for short pressure spikes. It lists a continuous working pressure and a significantly higher burst pressure, giving installers confidence when routing near clamps, fittings, or routed bends.

• Working pressure: 100 PSI for normal operation.
• Burst pressure: 300 PSI for transient overload protection.
• Minimum bending radius: 128 mm to prevent kinking under tight bends.

Does the size and length fit automotive heater and radiator applications?

The hose is 5/8" (16 mm) inner diameter with outer diameter and tolerances sized to common heater and radiator fittings. A 50-foot coil provides enough hose for multiple repairs, custom runs, or carrying as a service spare without needing frequent joints.

• Inner diameter: 5/8" (16 mm) with ±0.5 mm tolerance for snug fittings.
• Outer diameter: 0.94" (24 mm) with ±0.6 mm tolerance for clamp compatibility.
• Length: 50 ft — suitable for several installations or long routing paths.

Which fluids and uses are appropriate for this hose?

This hose is formulated for coolant and other similar fluids used in engine and heating systems. It is suitable for antifreeze blends, water, and hot-water circulation in residential or automotive systems, but avoid fuel, solvents, or incompatible chemistries not listed by the manufacturer.

• Compatible media: engine coolant, antifreeze, hot water.
• Not intended for gasoline, diesel, or strong solvents.
• Common uses: heater core lines, radiator-to-reservoir runs, hot-water heater plumbing.

Who is this for: EVIL ENERGY's 5/8" Heater Hose is aimed at mechanics, DIY vehicle owners, fleet technicians, and home plumbers needing a reliable, all-weather coolant line. It suits anyone who wants a long run of quality EPDM hose for repairs, custom coolant routing, or stocking spare parts for service vehicles. If you require a flexible, pressure-rated hose that meets SAE 20R3 Class D-2 expectations and offers broad temperature tolerance, this product is a practical choice.