The 5800 Fleck legacy continues with the new 5810 1-in. valve and 5812 1-¼-in. valves. Discover a common solution for a wide variety of filtration and softening applications with the Pentair 5800 Series of Fleck valves. Developed on the same platform as the 5800, the 5810 and 5812 valves offer flexibility with a familiar appearance while reducing carry costs and product knowledge.