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NEW Nilfisk Hot Pressure WashersPressure WashersMachine Parts by BrandPumps & SparesPopular High Pressure HosesHose ReelsNozzlesPressure Washer TriggersUnloader ValvesInterpump Service KitsWater reduction inserts and flow restrictor bodies for limiting water use where flow needs to be controlled. The range includes flow restrictor bodies in 1/2" male x 1/2" female and 3/4" male x 3/4" female, and water reduction inserts in 2.7mm, 3.1mm, 3.3mm, 3.8mm and 4.8mm sizes. Choose an insert size to give the flow you need.