Is there a recommended deck height for my Izzi whirlpool bathtub?
Usually this is 20 inch, but you can raise the deck as long as the bottom of the tub is supported by the floor by shimming or a platform. The tub cannot hang by the flange unsupported. Your deck must be at least as high as indicated on your Izzi spec sheet for the overall tub height. To learn more: http://izzibath.com/acrylicbathinstallation.