The 5.00" Shur-Lock II Coupler from Duraline is engineered to provide an air and water-tight connection, making it an essential component for coupling HDPE and PVC conduit systems. Its versatility extends to joining dissimilar materials such as threaded or non-threaded metal conduit and fiberglass, accommodating different installation needs. Designed with user convenience in mind, this coupler features stainless steel band clamps that can be easily tightened by hand, requiring only a 5/16" nut driver, allowing for seamless one-person installation without the need for special tools. With a pre-lubricated O-ring ensuring an airtight seal capable of withstanding pressures up to 125 psi, this product offers exceptional pull-out strength across various conduit types. Furthermore, it maintains the internal diameter without reduction, which is crucial for consistent flow and performance. As a reliable choice for electrical installers demanding ETL/UL listings, including compliance with CSA STD C22.2 18.3-04 and UL STD 514B, this coupler is optimized for underground and concrete-encased applications, ensuring robust connections where they are needed most while considering the specific requirements of various environments.