This 4-inch conduit seal-off from GMP Tools is designed to efficiently clean water and debris from various conduit systems, ensuring optimal performance during installation. With the capability to handle long runs, it offers easy pullback, making it an invaluable accessory for cable placement. The secure fit is achieved simply by turning the wing-nut handle, which expands two durable rubber plugs for a firm seal, effectively preventing any contaminants from compromising the system. Rated for a maximum pressure of 15 psi, this flexible rubber solution is built for repeated use and is compatible with most types of system configurations, providing both reliability and convenience for technicians in the field.