For compatible Pentair equipment, Pentair Dyn/Dynt 1-1/2" FBT x 1-1/2" Slip Union Kit [Set of 2] helps restore the original repair path for fittings & valves: unions applications. This union kit creates serviceable transitions from FBT thread to 1-1/2 inch slip pipe, making it useful for equipment pad repairs where plumbing must come apart cleanly for future maintenance. Designed for compatible Pentair pool and spa equipment Helps support efficient maintenance, rebuilds, or component replacement Useful for restoring the original function of the listed fittings & valves: unions part Use part 352210Z when the existing component is worn, cracked, leaking, missing, or no longer performing as intended. Confirming the model and part number before installation helps protect flow, sealing, alignment, and long-term equipment reliability.