US2009294370A1
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System for filtering water or wastewater
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US2008190835A1
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Filter system
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US2008099412A1
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System and method for uniformly distributing a fluid through a filter bed in a filter
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US2008099411A1
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System and method for uniformly distributing a fluid through a filter bed in a filter
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US2007235382A1
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Underdrain system
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US2007175832A1
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Method and apparatus for monitoring an underdrain of a filter system
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US2007039867A1
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Flume for a filter system including at least one filter having a filter bed that is periodically washed with liquid, gas or a combination thereof
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US2007023346A1
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Filter having a filter layer that forms a protective barrier to prevent clogging of a gravel-less underdrain and method of making the same
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US8052871B2
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Underdrain system
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US2006175251A1
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System for settling solids or other impurities from water or wastewater and associated methods
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US6942795B2
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Modular filter system and method of repairing and/or replacing components thereof
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US6998046B2
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Filter system and methods of operating the same
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US6982034B2
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Underdrain system
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US6616852B2
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Modular filter system
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US6569327B2
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Apparatus for directing fluids through a filter system
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US5980755A
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Methods and apparatus for monitoring a filter bed by differential pressure
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US6740237B1
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Low profile extruded underdrain
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