EVIL ENERGY 5/16" Heater Hose 5 ft — Black EPDM Coolant Line, 100 PSI, SAE 20R3

The EVIL ENERGY 5/16" heater hose is a 5-foot EPDM coolant line rated for 100 PSI and built to connect radiators, heater cores, and overflow reservoirs reliably in automotive cooling systems.

This compact, straight heater hose combines durable EPDM rubber with SAE 20R3 construction to handle coolant, water, and antifreeze across a broad temperature range. Sized for 5/16" (8 mm) inside diameter fittings, the hose is designed for routine engine cooling and heater plumbing tasks where flexibility, pressure capacity, and thermal tolerance matter.

What materials and specifications define this hose?

The hose is made of EPDM rubber and meets SAE 20R3 Standard Wall Class D-2 requirements. It supports continuous use in temperatures from -40°F to 257°F and offers a working pressure of 100 PSI with a 300 PSI burst rating.

• ID: 5/16" (8 mm) with ±0.4 mm tolerance
• OD: 0.55" (14 mm) with ±0.5 mm tolerance
• Length: 5 feet (1.52 m)
• Min bending radius: 64 mm

How does this hose perform in an engine cooling system?

Engineered for coolant lines, the hose resists weathering, heat, and common cooling fluids without rapid degradation. Its working and burst pressures provide a margin for typical engine operating conditions and short-term pressure spikes.

• Compatible with coolant, antifreeze, and water
• High temperature tolerance for hot zones near the engine
• EPDM composition resists ozone and heat-related aging

Is this hose easy to install and route in tight spaces?

The 5/16" inner diameter and 64 mm minimum bend radius make the hose flexible enough for compact routing while retaining shape under pressure. Its straight profile simplifies cutting to length and attaching standard clamps or barbed fittings.

• Straight 5 ft length for trimming to fit
• Flexible EPDM suitable for tight bends within the specified radius
• Works with standard clamps, fittings, and connectors for secure attachment

How do I verify compatibility with my vehicle or system?

Measure the existing hose ID and check the required temperature and pressure ranges against this hose’s ratings. For non-standard fluids or extreme operating environments, consult specifications or a technician before installation.

• Confirm 5/16" (8 mm) inner diameter matches fittings
• Ensure operating temperature and pressure fall within the hose limits
• Trim to length and secure with appropriate clamps or fittings

Who is this for: This EVIL ENERGY heater hose is aimed at DIY mechanics, fleet maintenance teams, and automotive hobbyists who need a reliable, cut-to-fit coolant line for heater cores, radiator connections, or overflow reservoir plumbing. It suits projects where compact diameter, high temperature tolerance, and SAE 20R3 compliance are important. If you require a different size, longer length, or specialized fluid compatibility, choose an alternative product tailored to those needs.