Diatomaceous earth is a porous powder with microscopic openings that when magnified look like tiny sponges. Clear water can pass through these openings, but particles, as small as two to five microns, are trapped during the first pass through the media. D.E. filters have internal elements that become coated with D.E. It is this filter cake that strains dirt, dust and algae from the water.

Similar to sand filters, when D.E. filters become dirty, they are cleaned either by backwashing, or regenerating and draining the clogged D.E. to the waste line. To restore filtration, a fresh charge of D.E. is added to the filter. For sparkling, clean pools; step up to Hayward D.E. filters.

DE2420, DE3620, DE4820, DE6020 and DE7220
Pro-Grid vertical grid D.E. filters provide superior water clarity, efficient flow and large cleaning capacity for pools and spas of all types and sizes. Constructed with high-strength reinforced thermoplastic, Pro-Grid combines high-technology features and service-ease design for an unparalleled filtration value for both new pool and aftermarket installations. In addition, Pro-Grid delivers low maintenance and dependable operation. Features

• Reinforced thermoplastic filter tanks constructed from durable glass reinforced copolymer to meet the demands of the toughest applications and environmental conditions, including in-floor cleaning systems
• Self-Aligned tank top and bottom make access to servicing the grid elements fast and simple
• Heavy-duty, tamper-proof one-piece flange clamp securely fastens tank top and bottom, allowing for quick access to all internal components without disturbing piping or connections
• High impact grid elements designed for up-flow filtration and top-down backwashing for maximum efficiency
• Integral lift handles and uniform low-profile base make removal of grid nest fast and simple
• Inlet diffuser elbow distributes flow of unfiltered water evenly to all filter elements and provides even distribution of D.E. to grids
• 72 ft filter made of reinforced thermoplastic allows for both commercial and large residential applications and years of non-corrosive, trouble-free performance
• New High capacity, rapid release manual air relief valve bleeds air with a quick quarter turn of the lever