An improved steam boiler scale inhibitor, sludge TSSand Total Dissolved Solids (TDS) control, and automatic bottom blow-down management system which totally eliminates the use of scale inhibitor chemicals and eliminates manual blow down for sludge control TSS. The present system is attached by a single hookup to the mud leg or the bottom blow down port of an existing boiler. The system includes a closed-loop duct with inline circulator pump to draw water from the bottom of the boiler drum and return through the same bottom outlet port. The system includes a TDS controller connected to the circulator pump, and to both a “smart” valve and a high temperature probe exposed inside the closed loop duct. The TDS Controller is preprogrammed to time the opening, open duration and closing of the smart valve depending upon the water quality at the site location as sensed by the probe, thereby allowing for the control of TSS and TDS in the drum water. The water is also exposed to an in-line descaling tool within the system. An alternative embodiment is also shown that is better suited for boilers with pressure vessel codes requiring both fast & slow bottom blow down valves.

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