Waterway Union Assembly [2"MPT x 2" Slip Union] (400 5080) skimfilters This replacement is especially useful This replacement is especially useful when the original rear panel is dented A dispenser in this class is useful because it helps provide a more controlled approach to bromine delivery while making it easier to keep the system supplied during routine maintenance This Waterway assembly is especially practical in equipment areas and retrofit installations where one side of the plumbing is already built around threaded fittings Using the correct union helps maintain compatibility and preserve easier service access later