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NEW Nilfisk Hot Pressure WashersPressure WashersMachine Parts by BrandPumps & SparesPopular High Pressure HosesHose ReelsNozzlesPressure Washer TriggersUnloader ValvesInterpump Service KitsInterpump oil dipsticks and oil sight glasses for pressure washer pumps, including a 3/8" x 97mm dipstick, a 51mm long oil dipstick, the Interpump oil sight glass 44.2118.01 and oil sight glass 97.5968.00. The oil level should sit halfway up the sight glass on the pump crank housing.