Important Made in USA Origin Disclaimer: For certain items sold by on the displayed country of origin information may not be accurate or consistent with manufacturer information. For updated, accurate country of origin data, it is recommended that you rely on product packaging or manufacturer information. Pro-SeriesTM sand systems are designed and equipped to offer the ideal combination of energy efficiency and outstanding water clarity. We are an Authorized Hayward Dealer\nThe Hayward VL40T32S Pro Series sand system is designed and equipped to offer the ideal combination of energy efficiency and outstanding water clarity. A broad selection of filter sizes, pumps, and accessories allows you to choose and merchandise the system(s) that best suit your above-ground pool program.\nSand filters are one of the most popular and cheap way to filter water. For good reason. They are simple, effective, and require very little attention. Pool water is routed through a sand-filled pressure vessel. In this method, impurities are extracted from the water using sand to collect and attract the debris as small as 20 to 40 microns. Over time, dirt accumulates in the spaces between the sand particles causing the pressure in the vessel to rise as water finds it harder to pass through. This signals you to "backwash" the filter. Simply reverse the water flow and "knock out" the dirt

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