Waterco Side Mount 2" 6 Pos Multiport Valve (2290590) tools This version is especially useful This version is especially useful when the installation depends on the boxed heater format rather than a simpler unboxed replacement The SherLok 160 fit and 26 inch relationship give this part practical value because internal filter components work best when they match the original size and assembly relationship closely A multiport valve in this style is useful because it centralizes major filter functions in one assembly while matching layouts where side mounting is the correct configuration Useful when the original valve is worn or unreliable