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Sarco Thermostats Ltd. of Cheltenham, Gloucestershire.
1888 Sanders, Rehders and Co in London imported Sarco thermostatic steam traps from Germany.
1908 Office established in New York, began trading as the Sarco Fuel Saving and Engineering Company.
WWI manufacture of steam traps began under licence in USA
1932 a new business was established in London to manufacture Sarco steam traps but under a different brand name: Spirax (derived from the helical spiral tubing which formed an integral part of the steam traps).
1935 Sarco set up its own factory in Pennsylvania, and the company became known as the Sarco Manufacturing Corporation. Sarco-branded steam traps and apparatus were exported to Europe; Sanders, Rehders & Co. had become a selling agent for Sarco products and changed its name to Sarco Thermostats