Designed for use with preformed shower bases; fiberglass, acrylic, nylon, or metal. Solvent welds over 2" Schedule 40 SWV pipe. Fiber and rubber gasket provides a tight seal to the base. Includes 4-1/4" stainless steel snap-in strainer. Allows lower section to be solvent welded over 2" Schedule 40 DWV pipe before the shower stall is set in place. Upper section comes with a locking wrench for easy tightening.