For a clean repair, start with the correct part. Pentair FSH/FNS/Quad Nut (194997Z) addresses a specific service point while preserving compatibility with the intended Pentair application. This replacement nut is used in FSH, FNS, and Quad filter assemblies where proper hardware tension keeps internal parts secured. It is useful when the existing component shows wear, damage, age-related failure, or performance issues in the larger pool or spa system. Made for DE filter hardware replacement Supports secure assembly fit and easier future service Check thread condition, compatible location, and torque control before installation Use part number to verify fit For best results, clean the surrounding area, check for secondary wear, and verify the assembly operates smoothly after installation.
