EVIL ENERGY 3/4 in Heater Hose Coolant Radiator Straight 20ft

In this review of the EVIL ENERGY 3/4 in heater hose, the bottom line is simple: it is a durable, flexible replacement hose for cooling system and hot water applications that offers professional-grade material and pressure ratings at a value price. The reviewer found the hose well suited to anyone needing a long length of reliable EPDM tubing for radiator-to-overflow, heater core, or general coolant lines, and highlights its 100 psi working pressure, 300 psi burst margin, and broad -40F to 257F temperature range as the single biggest reason to buy.

Key Features

• Size and length: The 3/4 in inner diameter and 20 ft length make it easy to cut custom runs for cars, trucks, or workshop projects without splicing multiple short pieces.
• Material construction: Made from EPDM rubber, the hose resists heat, ozone, and common coolant chemicals so it lasts longer in engine bays and heater systems.
• Pressure capability: A 100 psi working pressure and 300 psi burst pressure provide a wide safety margin for normal cooling system demands and brief pressure spikes.
• Temperature range: Rated from -40F to 257F, the hose handles both winter cold starts and sustained engine temperatures without becoming brittle or soft.
• Standard compliance: Meets and exceeds SAE 20R3 Standard Wall Class D-2, which helps ensure consistent wall thickness and durability compared with generic hoses.

Who It's For

This hose is best for DIY mechanics, professional technicians, and hobbyists who need a long, continuous length of heater or coolant hose for radiator-to-overflow connections, heater core runs, or custom cooling system plumbing. Its 3/4 in ID and 20 ft length suit many passenger cars, light trucks, and workshop projects where flexibility and cut-to-fit length are important.

Those who need specialty braided lines, extremely high-pressure hydraulic hoses, or a different inner diameter should look elsewhere; this product is intended for coolant, water, and antifreeze applications rather than fuel or high-pressure hydraulic service.

Pros & Cons

Pros

• Good value for a full 20 ft of EPDM hose with factory tolerances and SAE compliance.
• Flexible and easy to route, which customers and the reviewer noted helps installation in tight engine bays.
• Durable under heat and chemical exposure due to EPDM construction and broad temperature rating.

Cons

• Some users comment on varying perceptions of thickness; this hose is thicker than many aftermarket alternatives, which can be a benefit but might be slightly stiffer for very tight bends.

Specifications

Inner diameter	3/4 in (19 mm), tolerance 0.6 mm
Outer diameter	1.10 in (28 mm), tolerance 0.8 mm
Length	20 ft
Material	EPDM rubber
Working pressure	100 psi
Burst pressure	300 psi
Temperature range	-40F to 257F

Our Verdict

The EVIL ENERGY 3/4 in heater hose is a practical, cost-effective choice for cooling system repairs and custom runs, offering robust EPDM construction, solid pressure ratings, and a long 20 ft length that reduces the need for joints. Buy it if you want a dependable, flexible coolant hose for heater cores, radiator overflow, or general coolant plumbing; skip it if you need braided lines or a different diameter for specialty systems.

Frequently Asked Questions

Can this hose handle engine coolant and antifreeze?
Yes. It is compatible with coolant, water, antifreeze, and similar media and is formulated to resist those chemicals.

Is the 3/4 in size an exact fit for standard heater connections?
The ID is 3/4 in (19 mm) with a 0.6 mm tolerance, so it fits most standard heater and radiator fittings for that size but always check actual clamp and fitting dimensions.

How flexible is the hose for tight bends?
The hose is reasonably flexible and has a minimum bending radius of 152 mm; it is thicker than some cheap alternatives, which gives durability but can make very tight bends slightly stiffer.