Carvin Laser L250C 7C 25" Top Mount 1 1 2" Valve Sand Filter (94089250) grasslin Helps restore proper fuel delivery Helps restore proper fuel delivery to the pilot assembly and this Maytronics version is designed for M4 and M5 applications and supplied in a quantity of four using the 9991433 R4 reference The Carvin Laser L250C 7C sand filter is designed for pool systems that need dependable top mount sand filtration in a 25 inch format This version with a 1 1 2 inch top mount valve is especially useful when a compatible filter needs replacement or when the application calls for a larger top mount sand filter with this connection style