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NEW Nilfisk Hot Pressure WashersPressure WashersMachine Parts by BrandPumps & SparesPopular High Pressure HosesHose ReelsNozzlesPressure Washer TriggersUnloader ValvesInterpump Service KitsComet control sets for Comet diaphragm pumps, including Sirius, Gemini and GCP3V control sets. Each control set is listed by its Comet part number, from 1204019100 to 1204057100. Check the part number and pump model against your existing control set before ordering a replacement.