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The Pressure Washer Injector is in charge of adding chemicals to the water system of your washer. These chemical cleaning solutions help break down the dirt and other debris on the surface you are washing. High pressure injectors inject the chemicals upstream from the pump, so you can continue to apply a high pressure spray. The more common low pressure injectors, like the Quick Connect injectors, are installed downstream (after) from the pump, so the chemicals can be applied under low pressure. If you want to install or replace a pressure washer injector, Jack's has all the components you need. We carry acid injectors, chemical injectors, chemical strainers, high pressure injectors, Quick Connect injectors, and metering valves. We even have sludge pumps, so you can use your pressure washer as a water pump. Select the pressure washer parts you need below.