The Clearflo adjustable trip lever pop-up drain works perfectly with 23- to 25-inch deep baths and whirlpools. You can depend on solid-brass construction for durability and reliability, and KOHLER finishes resist corrosion and tarnishing, exceeding industry durability standards over two times. Installation flexibility is ensured with above- or through-the-floor options. 17-gauge brass construction. Brass tailpiece. 2" (51 mm) NPT connection. Above-floor or through-floor installation. For whirlpool baths with 23" (584 mm) to 25" (635 mm) depth.