Introducing The New All2easy From One2flush, With The Redesigned One2flush Dual Flush Kit, You Can Keep The Tank On For The Install. Various Varcomes In The Box For All Standard Flush Valve Styles, An Angled Gasket, A Flat Gasket And An Overflow Tube For The Mansfield Style Flush Valves. Our New Dual Action Handle Is Spring Loaded So It Feels More Like A Traditional Style Handle. To Promote Water Savings Because The Half Option Is Used More Often Than The Full, Push The Handle Down For A Half Flush And Up For A Full Flush. Saves An Average Family 10,000 Gallons A Year.