These Waterway pump traps look similar, but they are not interchangeable. Before you order a replacement be sure to check the size of the union nut that connects the trap to the face of the pump. The union nuts are different sizes and are labeled with different part numbers(as shown in lower pics). Trap 310-6500 will fit the Hi Flo and Hi Flo II pumps. Trap 310-5400 will fit the Iron Might, E Series, Spa Flo, TWM, and Center Discharge pumps.
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