Kermi ABC Technical terms made easy. Our shower design terms listed alphabetically and explained. A B C D E F G H I J K L M N O P Q R S T U V W X Y Z A abP The National technical approval (abP) is [...] lly and explained. A B C D E F G H I J K L M N O P Q R S T U V W X Y Z A abP The National technical approval (abP) is proof [...] sure the shower enclosure is held firmly in place. Whether T-shaped stabilizer, a 90° stabilizer, or a 45° stabilizer is [...] above the tiles, this can cause problems during installation. T Tiling the shower area There are several things to note when [...]