Product: Water Temperature Seal for Coolant Hoses Sizes: 26 mm, 28 mm, 38 mm, 40 mm Why you need it Prevents overheating and mechanical damage by providing a reliable connection point for measuring coolant temperature. Gives accurate, real-time temperature readings so you can detect cooling system issues early and protect your engine. Fits directly into the coolant hose line without system modification, making temperature monitoring practical for everyday use and maintenance checks. Key benefits and features Four size options (26 mm, 28 mm, 38 mm, 40 mm) to match a wide range of coolant hoses. Designed to accept a thermometer/probe via the coolant hose connection, enabling precise monitoring of water temperature. Simple, no-modification installation: mounts inline on the hose and secures with the included two adjustable clamps. Secure seal and clamp system keeps the connection tight under normal operating conditions and prevents leaks. Suitable for most vehicles, including cars and trucks; ideal for routine maintenance, troubleshooting, and performance monitoring. Performance and compatibility Function: provides a sealed, accessible port for measuring coolant temperature directly in the hose circuit. Compatibility: available in four diameters to fit common hose sizes—choose the size that matches your vehicle hose OD. Installation requires no cutting beyond the hose opening where you install the seal; the pair of adjustable clamps ensures a firm fit. Practical applications (examples) Daily driving: install to monitor coolant temperature and catch early signs of thermostat or cooling-system failure. Towing or heavy load conditions: keep an eye on coolant temperature during sustained high-load operation to prevent overheating. Performance tuning and diagnostics: use as an inline port to obtain accurate coolant temperature data while tuning or troubleshooting engine cooling behavior. What’s included One water temperature seal (select diameter: 26 mm, 28 mm, 38 mm, or 40 mm) Two adjustable clamps for secure installation Installation notes Select the seal diameter that matches your hose. Cut or open the hose as required for inline installation, insert the seal, and tighten the two supplied clamps to secure. No vehicle-specific modifications required beyond hose installation. Choose the correct diameter for your hose to add a reliable, easy-to-install temperature port to your cooling system and improve your ability to monitor and protect your engine.