This picture shows one of the two sets of the wash jets within the washbox.
We now use straight spray jets, arranged in two banks of 10 jets per spray bar. Older machines used angled jets, which are more expensive to replace. They also applied a torque on the spray head, which tries to twist the header out of alignment. Aiming the straight-jet spray bar properly is also a lot easier than the angled jets.
Each spray header can be removed from the washbox with one bolt. They are sealed to a one-piece manifold assembly by an O-ring. This makes cleaning a lot easier... although you do not have to clean the jets nearly as often, with the superior filtration of the shaker screen filter.
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