The 2-Chained Medium Duty Chain Knocker is equipped with the X-tip offering the most aggressive descaling power with good flexibility inside hard metal pipes. With the double hub design and two chains it can reach some hard-to-reach areas while still being able to descale effectively. This 2-Chained option might navigate through most bends but struggles with some of the tightest bends. How does it perform compared to other chain knocker options? In comparison this 2-Chained option offers a slightly broader cleaning surface with the cost of flexibility than 1-Chained option and a bit more flexibility with slightly lesser descaling speed than the 3-Chained option. For maximum flexibility, with the cost of cleaning surface we recommend considering Mini Chain or the 1-Chained option. If you mostly have straight lines with barely any bends we highly recommend the 3-Chained option to speed things up. It is also good to think about Circular Chain Knockers in these situations but they do lack flexibility even more. It is recommended to have at least one flexible option with you. Most Aggressive Descaling in Hard Pipes Like all the other Medium Duty Chain Knockers, this 2-Chained 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. Available in following sizes: 50mm (2″) for flex shaft thicknesses of 6mm (¼″), 8mm (⁵⁄₁₆″) 75mm (3″) for flex shaft thicknesses of 6mm (¼″), 8mm (⁵⁄₁₆″) and 10mm (⅜″)
