The Mainstream Whirlpool Tub from American Standard treats you to a spa-like experience at home. Soothe sore muscles, relax, and indulge in the therapeutic benefits of eight strategically placed, adjustable jets designed for allover hydromassage or targeted relief in specific areas. Adjust the air volume to create powerful water movement or more gentle ripples for quiet relaxation Our exclusive EverClean silver-ion additive is molded into the circulation piping and jets to inhibit the growth of bacteria, mold and mildew.