Series 211-12 PVC and ABS drains are designed for use in showers, bathrooms and other finished floor areas. They are fitted with a cast iron flashing collars with seepage openings and make a watertight bond with flooring membranes. All accept 4" NPSM straight threaded shanks and are compatible with a selection of 5 to 6 inch Smith 210 Series strainer tops. Accurate adjustment of the top to floor level is accomplished after drain installation by simply rotating the threaded strainer shank until proper height is reached.