This is the Super Duper Ultra GIZZMO. The Ultra GIZZMO uses the unique sealed air cushion of the GIZZMO combined with a built in blowout tube.The choice of 1 1/2 or 2 inch tapered pipe threads allows the Ultra to accomodate most skimmers. The integral blowout tube provides the option to use the Ultra GIZZMO as a suction line extension to clear the lines without lowering the water level in the pool. The Ultra GIZZMO features double threads with rubber gaskets, a blowout tube with a rugged cap and generous lug style grips around the top for easy handling and convenience. For a professional fit, the GIZZMO can be used with teflon tape. Teflon tape is a very thin white tape used to wrap the threaded ends of pipes to improve the watertightness of a joint. The GIZZMO is designed for single season use. Please remember to recycle this product.