The new type of sealing joint solution by using both ends of pipe(Spigot-end & Socket-end) injection molding, and sealed with the rubber ring. - High Efficiency Injection processing. Joint about 5-10 minutes. Generally, it will take about 1 hour if use other processing methods to produce the same diameter joint. - Saving Materials Saving more than 50% material by comparing with winding socket collection if using ratio injection methods and improving joint strength by optimizing cyclic structure. - Reducing Energy Consumption saving more than 20% electric quantity than single extrude methods if using re-injection extrude methods after extruding plastic by one extruder. Easy installation Using sockets, easy installation. There’s no need special skill Excellent performance Socket loops seal is a classic technical of flexible connector, It has excellent distortion resistance & uneven sedimentation leakage as well as excellent applicability of operation condition.