A waste fitting for a basin, or similar item, comprising a first open end, a second open end and an inlet between the first and second ends. The waste fitting comprises a first seat for a plug, the inlet being located between the first seat and the second end, and a second seat for a plug, the second seat being located between the inlet and the second end. The inlet is connected in use to the overflow of the basin or similar item. With the plug in the second seat, the portion of the waste fitting above the plug, and the overflow system, may be filled with and may retain a cleaning or disinfecting product.