EVIL ENERGY 3/4" Heater Hose 5ft Black EPDM 100 PSI SAE 20R3 – Radiator & Heater Coolant Line

EVIL ENERGY 3/4" Heater Hose is a 5-foot EPDM coolant line rated to 100 PSI and built to SAE 20R3 standards for reliable radiator, heater, and overflow connections.

This high-performance heater hose is designed for automotive and small-engine cooling systems where heat, pressure, and fluid compatibility matter. Constructed from EPDM rubber and manufactured to meet SAE 20R3 Class D-2 criteria, the hose handles hot water, coolant, and antifreeze across a wide temperature range. Its 3/4" inner diameter and robust wall construction make it a practical replacement part for heater cores, radiator-to-reservoir lines, and general coolant routing in passenger vehicles, trucks, and equipment.

What are the core specifications of this heater hose?

The EVIL ENERGY heater hose is specified for dependable performance under typical automotive conditions. Dimensions and tolerances are tight, the material withstands heat and ozone exposure, and pressure ratings provide everyday safety margins.

• Inner diameter (ID): 3/4" (19 mm) with ±0.6 mm tolerance
• Outer diameter (OD): 1.10" (28 mm) with ±0.8 mm tolerance
• Length: 5 feet (approximately 1.52 m)
• Working pressure: 100 PSI; burst pressure: 300 PSI
• Temperature range: -40°F to 257°F (-40°C to 125°C)
• Minimum bending radius: 152 mm; meets SAE 20R3 Standard Wall Class D-2

How durable and heat-resistant is the EPDM construction?

EPDM rubber is chosen for its resilience against heat, steam, and weathering; this hose resists hardening, cracking, and degradation from coolant and engine bay conditions. Its rated temperature range supports both cold starts and sustained operating heat without rapid breakdown.

• EPDM formulation resists heat, ozone, and aging
• Works across -40°F to 257°F for broad climate compatibility
• Designed to meet SAE 20R3 for long-term durability
• High burst-to-working pressure ratio for safety margins

Which fluids and systems is this hose compatible with?

This hose is suitable for common automotive cooling fluids and related liquids, making it versatile for heater cores, radiator feed lines, and overflow connections. It is not intended for fuels, oils, or solvents unless specified otherwise by the manufacturer.

• Compatible with coolant, antifreeze, and water-based engine fluids
• Commonly used for heater core and radiator-to-reservoir plumbing
• Suitable for repair, replacement, or custom routing applications
• Not specified for petroleum fuels or aggressive chemical solvents

How easy is it to install and what should I check before fitting?

Installation is straightforward for most do-it-yourself and professional mechanics: cut to length as needed, secure with proper clamps, and verify routing avoids sharp bends or heat sources. Follow clamp torque guidance and confirm the hose’s minimum bending radius to prevent kinking or stress during operation.

• Cut to desired length; use hose clamps rated for coolant systems
• Maintain minimum bending radius of 152 mm to avoid kinks
• Avoid direct contact with exhaust manifolds or sharp edges
• Inspect fittings and clamps periodically for leaks or wear

Who is this for: The EVIL ENERGY 3/4" Heater Hose is aimed at vehicle owners, mechanics, and fleet technicians needing a reliable coolant line for heater cores, radiator connections, or overflow plumbing. It suits routine repairs, preventative maintenance, and custom cooling projects where SAE-compliant materials, a wide temperature range, and a strong pressure rating are required. Choose this hose when you want a direct-fit-style, cut-to-length option that balances flexibility, heat resistance, and pressure capability for everyday automotive cooling systems.