Geberit''-Impuls 280 tank mechanization provide a full system of water circulation in the tank.It complies with all ceramic cistern with holes in lids Ø 20-40 mm and adjustable height 31.5 - 45.5 cm.The quantity of the purge, is adjustable with respect to the amount of water in the cistern.The scope of the inflow valve 0.5-10 bar .