Clean, healthy comfort. A Deep Soak® Max tub drain raises the water level by 3" for a deeper soak. Features a form-fitted backrest and dual armrests for added comfort. Fiberglass-reinforced acrylic construction. Alcove installation. American Standard whirlpools with EverClean incorporate a patented antimicrobial additive molded directly into the water circulation piping to inhibit the growth of mold and mildew on the pipes. Bathing pool only.