An assembly comprising a tubular inlet riser adapted to be mounted within a toilet tank where a main control valve assembly would be mounted on the upper end of the inlet riser, the tubular inlet riser having an inner riser bore so that fill water can pass through this bore when the tank empties in accordance with the main control valve assembly, the inlet riser having a bottom-most portion having an outer threaded portion and a bottom seat, the assembly further comprising a quick connect coupling.
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