No-Calk™ Shower Base Drain. Designed for use with preformed shower bases: fiberglass, acrylic, nylon or metal. Mechanically attaches over 2" Sch. 40 DWV pipe. Polished brass strainers have PVC lifetime finish. The drain is fixed to the drain pipe from above the shower base. Ideal for slab construction. Fiber and rubber gasket provides a tight seal to the base. 4-1/4" snap-in strainer.