Toilet tank fitting (fill valve ,flush valve ) Adjustable fill valve 1. Float cup, to close water filling momentarily and get working level stable. 2. Optional refill tube or non-refill function. Adjustable refill rate 0-28% by refiller knob. 3. Adjust the float cup up and down by the white buckle to adjust working water level in toilet tank. 4. Adjustable pole: adjust the float and the small cup to be at the same level. 5. The fill valve height could be fixed by the white buckle, adjustable height 6. Optional G1/2",G15/16"POM plastic thread and G3/8", G1/2" brass thread 7. Inside check valve prevents water in the toilet tank from back-flowing to water-supply hose. 8. Filter prevents impurity from going into fill valve and easily to be cleaned. Adjustable dual flush valve+Dual push button+washer gasket 1.The overflow pipe height could be customized as per request; 2.The chain length is adjustable and easy to install; 3.Conveniently adjust the bracket and the flush valve height from 4.Adjustable half-flush volume,when adjust the float cup from down to up ,the half flush volume decreases; 5.For 2-pc toilet,flush outlet O.Dia.59mm