Abstract: A device and system for purifying a fluid is provided. The system includes a tank having an interior space and a media container disposed within the interior space. A valve is provided that cooperates with an element within the interior, the valve being movable between an open and a closed position. The valve being biased to the open position when the element is not positioned within the interior space, wherein the interior space is fluidly coupled to the atmosphere in the open position. The valve further being configured to move to a closed position when the element is positioned within the interior space.

Abstract: A device and system for purifying a fluid is provided. The system includes a tank having an interior space and a media container disposed within the interior space. A valve is provided that cooperates with an element within the interior, the valve being movable between an open and a closed position. The valve being biased to the open position when the element is not positioned within the interior space, wherein the interior space is fluidly coupled to the atmosphere in the open position. The valve further being configured to move to a closed position when the element is positioned within the interior space.

Abstract: A cover system for a pickup truck bed having an open top defined by vertical spaced apart side walls, and a front wall is disclosed. The cover system includes a rollable cover unit which has the capability of being either completely or partially extended or retracted to close or expose the truck bed. The cover portion consists of a multiplicity of adjacent transverse rigid panels which are continuously connected along their transverse length by flexible resilient connecting strip members of flexible and water resistant material. The cover unit is extended or retracted by a drive system located at the upper forward section of the truck bed. The drive system includes one or more pinion-type cylindrical drive roller members intermediate the side walls of the truck bed which are in driving contact with and have teeth to positively engage rack-type teeth on the underside of the cover panels. Controls and motor means are provided to control and activate the drive system.

Abstract: A cover system for a pick-up truck having an open top defined by vertical spaced apart side walls, and a front wall is disclosed. The cover system includes a rollable cover portion which has the capability of being either completely or partially extended or retracted to close or expose the truck bed. The cover portion will consist of a multiplicity of adjacent transverse panels which, in preferred embodiments, are continuously connected along their transverse length by hinges of flexible and water resistant material. The cover portion will be extended or retracted by a drive system located at the upper forward section of the truck bed. The drive system will include one or more drive roller intermediate the side walls of the truck bed. The drive rollers will be in driving contact with and have a surface structured to positively engage the underside of the cover panels. Controls and a motor will be provided to control and activate the drive system. A reeling system will be provided adjacent to the drive system.