Carvin Laser L250C 7C 25" Top Mount 1 1 2" Valve Sand Filter (94089250) champlain This type of part is This type of part is especially useful when the original cartridge is worn restoring the check valve can help improve overall system behavior and reduce the kind of flow reversal that creates nuisance issues during operation or shutdown A sand filter like this is useful because it provides a proven media based filtration method that helps remove debris from the water while supporting familiar service routines The 94089250 is a strong replacement choice for compatible pool systems that need renewed sand filtration support and cleaner everyday water management