Pool valves are vital components in the swimming pool filtration system Managing Pool Valve Systems .They control the water flow, pressure, and direction, such that your pool water is clean and clear. There are different types used to control the water flow, which include diverter valves, check valves, and multiport valves to redirect the water flow through different system components... https://www.usapoolshop.com/blog/post/swimming-pool-valves-101-everything-you-need-to-know