Sentinel X400 System Restorer Concentrate (275 ml. Tube)

Sentinel X400 System Restorer is specifically designed for cleaning older closed loop hydronic heating systems. It is a non-acid treatment which restores circulation to radiators and pipework. Its ruthlessly efficient formula shifts built-up magnetite sludge, eliminating cold spots in radiators and restoring proper heat distribution.

One cartridge of Sentinel X400 Concentrate is sufficient to treat a typical residential system of 25 gallon. For larger systems, use more cartridges. To clean an existing system, Sentinel X400 Concentrate should be circulated, prefereably at normal operating temperature, with all valves open and the pump turned to maximum flow for a minimum period of 2 hours or until satisfactory performance is restored. Where systems are badly fouled, a longer period of circulation (e.g., up to 4 weeks) is recommended, but the product will not clear a completely blocked pipe. Flush the system before refilling and treating with Sentinel X100 Inhibitor.