A showerhead assembly for dispersing liquid, comprising a back part; a front part coupled to the back part to form a plurality of dispersion chambers; an inlet boss disposed between the front part and back part for connecting a liquid supply line; a liquid supply, rail disposed between the front part and the back part and connected to the inlet boss for leading liquid to the dispersion chambers; and a plurality of support members slidably coupled to the front part such that the support members can slide between the front part and the back part.
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