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NEW Nilfisk Hot Pressure WashersPressure WashersMachine Parts by BrandPumps & SparesPopular High Pressure HosesHose ReelsNozzlesPressure Washer TriggersUnloader ValvesInterpump Service KitsUnloader valves for ultra high pressure washers running at 500 bar and above. The range includes a VB60 ultra high pressure unloader, a VB53/500 unloader and Interpump BKX and H560 unloader valves. See each product page for pressure, flow and thread details, and check them against the pump on your machine before ordering a replacement unloader.