Diamond wash plants are critical elements of a diamond plant. Liberating diamonds to enable their recovery is particularly important in clay-based ore bodies. Manhattan sizes and selects a scrubber solution that enables the clay to be broken down and for the diamond to be released from its clay lockup. Scrubbers are manufactured in-house with cost optimization and operational reliability key factors in mechanical design considerations. Incorporation of a feeding system to ensure consistent throughput of the scrubbing circuit is also a critical element for a wash plant and to that effect Manhattan offers either high throughput feed bin designs or water-jet / grizzly feeder systems to ensure the scrubber receives the correct tonnes per hour feed, which enables optimal production performance.