EVIL ENERGY 5/8" Heater Hose 10FT Coolant Radiator SAE 20R3 100PSI

The EVILENERGY 5/8-inch Heater Hose is designed for routing coolant, antifreeze, and water throughout automotive and heating setups. Supplied in a continuous 10-foot length, it suits DIY mechanics and vehicle owners who need a dependable line for engine cooling systems, hot water heaters, or connections between radiators and overflow reservoirs.

Constructed from EPDM rubber, this hose is engineered to manage tough thermal conditions ranging from -40°F to 257°F. It delivers a solid 100psi working pressure alongside a 300psi burst pressure, meeting and exceeding standard SAE 20R3 Standard Wall Class D-2 requirements for cooling system reliability under normal operating loads.

With an inner diameter of 5/8 inch (16mm) and an outer diameter of 0.94 inch (24mm), it provides standard flow capacity for matching fittings. When planning your installation route, note that the hose has a minimum bending radius of 128mm, meaning tight, sharp bends should be avoided to prevent kinking.

Verdict: This hose is an excellent, durable pick for anyone plumbing an engine cooling circuit, overflow tank, or hot water line. Its sturdy EPDM construction and SAE compliance provide dependable fluid transfer across extreme temperature swings.

• Inner Diameter: 5/8" (16mm) ±0.5mm
• Outer Diameter: 0.94" (24mm) ±0.6mm
• Length: 10 feet
• Material: EPDM rubber
• Working Pressure: 100psi
• Burst Pressure: 300psi
• Temperature Range: -40°F to 257°F
• Minimum Bending Radius: 128mm
• Standard Compliance: Meets and exceeds SAE 20R3 Standard Wall Class D-2
• Compatible Fluids: Coolant, water, antifreeze

A great fit if you:

• Need to plumb an engine cooling system or radiator overflow reservoir.
• Require a hose that resists temperatures between -40°F and 257°F.
• Want a continuous 10-foot run of SAE 20R3 compliant EPDM line.

Consider something else if you:

• Need a hose diameter other than 5/8-inch inner diameter.
• Must navigate extremely tight bends narrower than a 128mm radius.

What fluids are compatible with this heater hose?
It is designed for use with coolant, water, and antifreeze.

What are the pressure and temperature limits?
The hose has a working pressure of 100psi, a burst pressure of 300psi, and operates between -40°F and 257°F.

What is the minimum bend radius for installation?
The minimum bending radius is 128mm to maintain proper flow and prevent kinking.