Adjustable valve for controlling the amount of water refilling a toilet bowl after flushing

An valve apparatus used in a flush toilet for controlling flow of water from a water inlet line through the valve apparatus and into a flush tank, wherein the water inlet line is connected to a main valve which controls water flow to refill the flush tank through a main valve outlet, while simultaneously diverting water to an overflow pipe, the overflow pipe being connected to a toilet bowl for filling the toilet bowl as water in the overflow pipe is replenished, the apparatus comprising:

• a first tube extending from the main valve outlet;
• a secondary valve connected to the first tube for selectively controlling the rate of water flow through the first tube by controlling the size of an opening through the secondary valve;
• a second tube extending from the secondary valve to the overflow pipe;
• an operator connected to the secondary valve, the operator being accessible from outside of the secondary valve for controlling the size of the opening through the secondary valve to thereby control the rate of water flow through the second tube to the overflow pipe and to the toilet bowl so as to control the level of water in the toilet bowl at the time the water inlet is shut off by the main valve;
• and
• a removable support for the valve, wherein the support is a strut which has a first end and a second end, the first end being clamped to the overflow pipe and the second end being fixed to the secondary valve for holding the secondary valve at a position above the overflow pipe, wherein said support is variably adjustable along the overflow pipe so as to accomodate flush tanks of different heights.