- APPLICATION: The HOT-Stop Pen is designed to effectively seal cracks in concrete slabs, wall pipes, and corners indoors. Simply insert the needle into the water pipe, and expand the rubber ring to achieve an efficient water stop function. - STAINLESS STEEL CONSTRUCTION: The HOT-STOP Pen is made from durable stainless steel, ensuring high pressure resistance and stability. It integrates seamlessly into concrete structures, effectively preventing water leakage. - EASY TO USE: Secure the water stop pen with the provided wrench. Insert it into the water pipe, ensuring that the water flow is unobstructed. Continue welding the pipe with a hot melt machine. After the welding process is complete, remove the water stop pen. - COMPREHENSIVE WATER STOP KIT: Our kit includes three different sizes of PPR pipe water stops (1/2 inch, 3/4 inch, and 1 inch), a release pen, a T-shaped double shaft wrench, and additional rubber sleeves, providing you with the tools you need for various applications. - USE SCENARIOS: Ideal for repairing leaks in residential plumbing systems, securing water lines in concrete constructions, and maintaining integrity in wall installations. This kit ensures reliable water management for both DIY enthusiasts and professional plumbers.