Pipes in your system will have a C-Factor to help determine this loss. This is a measure of the roughness of the interior of the pipe that creates this friction. Different types of piping will have a different C-Factor, and the higher the C-Factor, the smoother the pipe.
A motif is a literary term that is an idea, object, or concept that repeats itself throughout a text. A motif gives clues to theme or reinforces ideas an author wants to emphasize. A motif generally reinforces the theme of the text. A motif must be repeated throughout a text to be considered a motif.
So What Is a Motif in Literature? While a symbol might occur once in literature to signify an idea or an emotion, a motif can be an element or idea that repeats throughout that piece of literature. A motif could be expressed by a collection of related symbols. For example, the motif of fragmentation (of a family, for instance) could come from several symbols that appear in a book: Shattered glass.