Part WP978025, Service Valve, is a genuine OEM part manufactured by Whirlpool. The manufacturer describes it as "VS20001 Tube, Process Following Parts Not Illustra". Service valve kit It is used in Thermador Refrigerators. Needs to be installed by a trained and licensed appliance repair technician. This item requires very specialized tools and knowledge to replace. Find appliance parts, lawn & garden equipment parts, HVAC parts and more from the top brands in the industry.