The CMP generic 5-3/4 inch weir is designed for compatible Pentair FAS style skimmer applications where the weir door needs replacement. A weir is useful because it helps manage surface-water entry into the skimmer, supporting better debris capture and more dependable daily skimming performance.This replacement is especially useful when the original weir is cracked, warped, faded, or no longer swinging correctly. Matching the correct 5-3/4 inch Pentair FAS style helps preserve intended fit and dependable operation.The 25141-160 is a practical service part when a compatible Pentair FAS style skimmer needs a weir to restore dependable surface-skimming performance. CMP generic 5-3/4 inch weir Designed for compatible Pentair FAS style skimmer applications Helps restore proper surface-water control Useful when the original weir is damaged or worn Supports cleaner and more dependable skimmer performance