Medium Duty Chain Knocker with Crown Drill Head is our most aggressive choice for getting through blockages in hard metal pipes hands down. The aggressive integrated Crown Head in the front obliterates roots, other stubborn blockages and unbelivably even solid concrete. While the Crown Drill Head tackles all these severe blockages, the chains follow right behind and finishes the descaling without stopping. This feature makes it exceptionally suited for straight lines where blockages are dense, though it sacrifices some flexibility for increased power. If you want, you can also buy regular chain knocker of your choosing and a seperate drill head. Then you can combine those two whenever you choose to get the same results. Ideal Use Scenarios The Medium Duty Chain Knocker with integrated Crown Drill Head is perfect for environments that require both aggressive descaling and targeted blockage removal without multiple bends to navigate. While the basic 3-Chained model offers a huge descaling speed and surface, this Crown Drill Headed version does that with an extra penetrating and clearing power in pipes, making it a strategic choice for more straightforward applications. Durability and Suitability Like all the other Medium Duty Chain Knockers, this 3-Chained Drill Headed model is also equipped with the sharp X-shaped tips that is considered the most aggressive descaling chain knockers available for hard metal pipe descaling while being slightly less durable than Heavy Duty Chains. Overall Medium Duty Chains are suitable for hard metal pipes like Cast Iron, Galvanized Steel Pipes, Orangeburg Pipes, Vitrified Clay Pipes (VCP), Terracotta/Clay Sewer Pipes and other hard material pipes. While we recommend this chain knocker for these kinds of hard metal pipes, please always check that the overall condition of the pipe to avoid using too aggressive chain to the task. If you are unsure if the pipe will withstand the descaling power, please choose more gentle option like Light Duty Chain Knocker, Circular Chain Knocker or Gentle Duty Brush. Do not use the Medium Duty Chain Knockers for PVC or other soft material pipes since the aggressive X-tip might eat it up in a matter of seconds. For PVC and other soft pipes we recommend going with Light Duty or Gentle Duty options. Some experienced professionals may find Heavy Duty Chains suitable for the most challenging tasks in PVC, but caution is advised to avoid potential damage. Remember, always assess the condition of the pipes to ensure the tool's power aligns with the task at hand to avoid overtaxing the pipe system. Available in following sizes: 50mm (2″) for flex shaft thicknesses of 6mm (¼″), 8mm (⁵⁄₁₆″), 10mm (⅜″) and 12mm (½″) 75mm (3″) for flex shaft thicknesses of 8mm (⁵⁄₁₆″), 10mm (⅜″) and 12mm (½″) 100mm (4″) for flex shaft thicknesses of 8mm (⁵⁄₁₆″), 10mm (⅜″) and 12mm (½″) 150mm (6″) for flex shaft thicknesses of 8mm (⁵⁄₁₆″), 10mm (⅜″) and 12mm (½″) 200mm (8″) for flex shaft thicknesses of 10mm (⅜″) and 12mm (½″) Chain thicknesses of 3.5mm & 4.0mm is selectable in some of these models.
