{"product_id":"evil-energy-3-8-heater-hose-coolant-radiator-straight","title":"EVIL ENERGY 3\/8\" Heater Hose Coolant Radiator Straight","description":"\u003cp\u003e\u003cstrong\u003eEVIL ENERGY 3\/8\" heater hose is a 10-foot EPDM coolant line built to SAE 20R3 standards for radiator, overflow, and hot-water system connections.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis straight 3\/8\" (9.5 mm) heater hose from EVIL ENERGY is designed for automotive and small-engine cooling circuits that need a durable, flexible conduit for coolant, water, and antifreeze. Constructed from EPDM rubber with industry-standard tolerances, it delivers a balance of heat and cold resistance, pressure capacity, and bendability for repair, replacement, or custom plumbing projects.\u003c\/p\u003e\n\n\u003ch3\u003eHow reliable is this hose for engine cooling systems?\u003c\/h3\u003e\n\u003cp\u003eThe EVIL ENERGY heater hose meets SAE 20R3 Standard Wall Class D-2 and is rated for a working pressure of 100 psi with a 300 psi burst pressure, giving a broad safety margin for typical automotive cooling conditions. EPDM construction provides proven resistance to hot coolant and common additives, and the specified temperature range covers severe winter and summer environments.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eWorking pressure: 100 psi; burst pressure: 300 psi\u003c\/li\u003e\n  \u003cli\u003eTemperature range: -40°F to 257°F for seasonal durability\u003c\/li\u003e\n  \u003cli\u003eMeets\/exceeds SAE 20R3 D-2 standard for heater hose use\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill the size and flexibility work in tight engine compartments?\u003c\/h3\u003e\n\u003cp\u003eThis hose has a nominal inner diameter of 3\/8\" (9.5 mm) with ±0.4 mm tolerance and an outer diameter of 5\/8\" (16 mm) with ±0.5 mm tolerance, making it compatible with common small coolant fittings. The minimum bending radius is 76 mm, allowing smooth routing around brackets and components without kinking when installed correctly.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eInner diameter: 3\/8\" (9.5 mm) with tight tolerance\u003c\/li\u003e\n  \u003cli\u003eOuter diameter: 5\/8\" (16 mm) for predictable clamp fit\u003c\/li\u003e\n  \u003cli\u003eMin bending radius: 76 mm to avoid sharp bends and stress\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat liquids and environments can this hose handle?\u003c\/h3\u003e\n\u003cp\u003eMade from EPDM rubber, the hose is compatible with coolant, water, antifreeze blends, and many non-pressurized fluid mixtures commonly found in heating and cooling systems. Its material resists heat, ozone, and many automotive fluids, making it suitable for both engine bay and hot water heater applications when used within its specified limits.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCompatible media: coolant, antifreeze, water\u003c\/li\u003e\n  \u003cli\u003eMaterial benefits: EPDM resists heat, ozone, and aging\u003c\/li\u003e\n  \u003cli\u003eApplications: radiator-to-overflow, heater core, hot water heater piping\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow should I cut, fit, and secure this hose for a clean installation?\u003c\/h3\u003e\n\u003cp\u003eCut the hose squarely with a sharp utility knife or hose cutter to ensure proper sealing and even clamp pressure. Use the correct-size clamps for the 5\/8\" outer diameter and avoid overtightening; allow for routing that respects the 76 mm minimum bend radius to reduce stress and premature wear.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eLength: 10 feet of continuous hose for multiple runs or custom cuts\u003c\/li\u003e\n  \u003cli\u003eCutting: clean, square cuts improve sealing with clamps\u003c\/li\u003e\n  \u003cli\u003eClamping: use appropriate-size clamps, tightened to manufacturer recommendations\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for? This EVIL ENERGY 3\/8\" heater hose is aimed at DIY mechanics, automotive technicians, restoration builders, and HVAC installers who need a dependable, standards-compliant coolant line for small-bore connections. It's especially useful when you require a long continuous length (10 feet) to supply multiple runs, replace damaged hose sections, or fabricate custom coolant plumbing. If you need EPDM resilience, predictable dimensions, and SAE 20R3 performance in a compact heater hose, this product fits those requirements.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Is this hose compatible with antifreeze?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The EPDM material is compatible with coolant and antifreeze blends when used within the specified temperature and pressure ranges.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can I cut the 10ft hose to length myself?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. It can be cut to size—make a square cut and use properly sized clamps to ensure a secure seal.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"EVIL ENERGY","offers":[{"title":"Default Title","offer_id":48087638474910,"sku":"B0C7VB2Q6Y","price":38.29,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/evil-energy-heater-hose-front-packaging_da1901fa-06f1-4d4f-b6e2-e59d00b61d00.jpg?v=1785927348","url":"https:\/\/northtrailauto.ca\/products\/evil-energy-3-8-heater-hose-coolant-radiator-straight","provider":"North Trail Auto","version":"1.0","type":"link"}