The TOWER-FLO® Closed Loop filter system by United Industries is designed for use in closed loop applications commonly found in heating and cooling systems. The continuous loop filter will remove suspended solids by directing a small portion of the system water through the permanent media filter removing contaminants to five microns in size.

Eventually, the filtered contaminants will build to a point when backwashing needs to occur. At this time the system will automatically isolate itself from the closed loop, allow water from municipal supply to enter the filter vessel for a preset time period and discharge through the backwash line carrying filtered contaminants to waste, and cleansing the media without loss of any treated system water.

The filter plant shall consist of one vertical pressure vessel, graded filter media, valves and facepiping, and control console with programmable timer for automatic operation.