flush valve 1. Dual flush valve, adjustable for full/ partial flush volume. 2. Import material for the flush sealing pad Name: Adjustable dual flush valve Item ... : 190mm, 230mm, 310mm, 350mm, 390mm)-2. Dual flush system, full/partial flush volume is adjustable, saving water.-3. High water ... . Provide two bases for one-piece and two piece toilet.-8. Highly adaptable for all kinds of toilets.-9. ...