Hose barb fittings connect flexible hose or tubing to threaded pipe or other components using barbed ridges that grip the hose ID when a clamp is applied. The barbs bite into the hose wall as the clamp compresses, creating a secure, pressure-resistant seal without adhesives or special tools. Hose barb fittings are the dominant connection method for flexible tubing in chemical dosing, water treatment, irrigation, laboratory equipment, and cooling water systems.