6X3 Flexible Coupling $10.50 Universal Pipe Connectors allow you to connect any size pipe, quickly and easily. Their time saving, fully tested design gives you professional results in minutes using only a slotted screwdriver or a 5/16″ nut driver or socket. Once installed, by tightening the stainless steel bands to 60″ lbs. torque, you are assured of a leak-proof, chemical resistant connection that is impervious to roots and unaffected by soil conditions. Made in the U.S.A. For use with HP220, FR150 and other 6″ duct radon fans. Add to cart