Pentair Water Pool and Spa, Inc.

Pentair Pool Products, Inc.

Robert Frank Swindell

Leonard Richiuso

Brian Everett Cox

Christopher Ryan Yahnker

Bret Schaller

Christopher R Yahnker

Arthur J Bromley

Timothy Michael Goodwin

Shirley A Bromley, Legal Representative

Bret Schaller Bret Schaller

A method for removing diatomaceous earth and contaminants from a filter, and for filtering liquid using diatomaceous earth is provided. Embodiments of the method can include a washdown process, a backwash process, and a filtering process. Some embodiments can include one or more filter cartridges with cartridge tubes to increase flow during the backwash process. Some embodiments can also include a backwash sprayer to disturb contaminants during the backwash process.

Diatomaceous earth filter apparatus and method

The invention provides an apparatus and method for removing diatomaceous earth and contaminants from a filter and for filtering liquid using diatomaceous earth. Embodiments of the method can include a washdown process, a backwash process, and a filtering process. Some embodiments of the apparatus can include one or more filter cartridges with cartridge tubes to increase flow during the backwash process. Some embodiments of the apparatus can include a backwash sprayer to disturb contaminants during the backwash process. Some embodiments of the apparatus can include a removable lid to access the filter cartridges during the washdown process.

Fluid filter devices include at least one porous body. In one example, the fluid filter device can be incorporated as part of a fluid filter apparatus. The fluid filter apparatus can include a container defining an interior area wherein the filter device is positioned within the interior area. Particulate can be positioned within the interior area to cover the porous body to enhance the filter capabilities of the fluid filter apparatus.

Filter devices including a porous body

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Sanford, NC, United States of America

Robert Frank Swindell