Abstract: A solid chemical feed unit dissolver has an upper feed unit chamber with an inwardly tapering sealing surface at its lower end and against which a lowermost feed unit seals, retaining the upper chamber in a dry condition, preventing wetting and caking of solid chemical feed units behind the dissolving and sealed off face of the solid chemical feed unit. A solid chemical feed unit magazine is slotted to permit gentle feeding of a plurality of solid chemical feed units therein and a cover-defined sight slot permits guiding and visual observation of remaining solid chemical feed units in the magazine. The magazine preferably, but not necessarily, defines the tapering sealing surface. Distinctly shaped solid chemical feed units are disclosed. The dissolver can handle large solid chemical feed unit loads up to one hundred pounds or more and in a small footprint stable configuration. Methods are disclosed.

Abstract: Removable chemical reservoirs are translucent and have filling marks on a front, hollow handle where chemical concentrate fill levels are visible and measurable. The reservoirs are filled with new concentrate from a current fill level mark to a full level mark and the volume of concentrate filled between the marks is calculated for filling and inventory purposes. The front handle is narrower than the reservoir sides and flanges at the upper end of the reservoir to facilitate in and out sliding of the reservoir for billing and cleaning.

Abstract: A controller for water treatment in a cooling system includes a processor, a user interface, a plurality of relays, at least one network port, and at least one communication port. The processor is configured to monitor cooling fluid in the cooling system and cause the system to drain fluid when an amount of dissolved solid in the fluid exceeds a predetermined threshold. The plurality of relays are configured for both wet operation and dry operation. The controller is accessed using a web server on the controller through a communication port. The controller is controller and control parameters are modified via the web server. A relay of the plurality of relays in the controller is configured for either wet operation or dry operation. The configuration of the relay of the plurality of relays is dynamically changed to the other of wet operation or dry operation.

Abstract: A solid chemical feed unit dissolver has an upper feed unit chamber with an inwardly tapering sealing surface at its lower end and against which a lowermost feed unit seals, retaining the upper chamber in a dry condition, preventing wetting and caking of solid chemical feed units behind the dissolving and sealed off face of the solid chemical feed unit. A solid chemical feed unit magazine is slotted to permit gentle feeding of a plurality of solid chemical feed units therein and a cover-defined sight slot permits guiding and visual observation of remaining solid chemical feed units in the magazine. The magazine preferably, but not necessarily, defines the tapering sealing surface. Distinctly shaped solid chemical feed units are disclosed. The dissolver can handle large solid chemical feed unit loads up to one hundred pounds or more and in a small footprint stable configuration. Methods are disclosed.

Abstract: A controller for water treatment in a cooling system includes a processor, a user interface, a plurality of relays, at least one network port, and at least one communication port. The processor is configured to monitor cooling fluid in the cooling system and cause the system to drain fluid when an amount of dissolved solid in the fluid exceeds a predetermined threshold. The plurality of relays are configured for both wet operation and dry operation. The controller is accessed using a web server on the controller through a communication port. The controller is controller and control parameters are modified via the web server. A relay of the plurality of relays in the controller is configured for either wet operation or dry operation. The configuration of the relay of the plurality of relays is dynamically changed to the other of wet operation or dry operation.

Abstract: Chemical additive preferably derived from a solid chemical concentrate is selectively educted into the closed water recirculation or makeup line of a water system. In one embodiment, a bypass line is controlled by a valve to direct system water through the eductor when chemical additive is desired, and at least a portion thereof around the eductor when no chemical additive is desired. Open line application is disclosed. In other embodiments, single or multiple, selectively operated eductors are used without any bypass line. In these embodiments, any time water flows through the chemical additive apparatus, water is treated.

Abstract: Removable chemical reservoirs are translucent and have filling marks on a front, hollow handle where chemical concentrate fill levels are visible and measurable. The reservoirs are filled with new concentrate from a current fill level mark to a full level mark and the volume of concentrate filled between the marks is calculated for filling and inventory purposes. The front handle is narrower than the reservoir sides and flanges at the upper end of the reservoir to facilitate in and out sliding of the reservoir for billing and cleaning.