Adapter (MIPT x Barb .25in x .375in) for the Pump Assembly on 2000+ Model Year SUNDANCE® Spas. NOTE: Figure 16 Only. Does include O-Ring (6540-263). (Click the diagram on the left for a larger, actual image) 6540-171
NOTE: This Barb Adapter is now made of Stainless Steel (6540-171). The old 6540-030 Barb Adapter didn't last in chemically treated water and was replaced by this new Stainless Steel version. The new version costs more but will never fail again.