DE filters also know as Diatomaceous Earth filters are a common method to filter swimming pool and spa water. DE filters use a very fine powder to coat internal grids or plates to capture debris and dirt as they pass through a filter tank or vessel.DE filter are available in many sizes usually noted in square footage. The most common sizes are 24, 36, 48, 60 and 72 square feet of surface. Most filters are rated at 2 gallons per minute of flow per square foot of surface area. An example would be a 36 square foot filter would be capable of up to 72 gallons per minute of flow. This is important so as not to attempt to use to large of a pump which could cause internal damage to the filter grids and the filter tank itself. DE filters have been manufactured in many different materials plastic, fiberglass and stainless steel.Most DE filters required a type of control valve, usually a valve known as a Multi Port Valve or a Slide Valve. Both types of valves allow the water inside the tank to be reversed as needed to “backwash” the grids when required. Multi port valves offer more… Read full this story
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