Cation/chloride cotransporter that mediates potassium-chloride and sodium-chloride cotransports. Involved in plant development and Cl(-) homeostasis. May be involved in long distance Cl(-) transport. Does not function as an H(+)-dependent cotransporter. Expressed in young seedlings cotyledon tips, plant vasculature, root tips and axillary buds. Expressed in root vascular strand in the pericycle and other parenchyma cells bordering xylem vessels. Expressed in the xylem/symplast boundaries of rosette stems, rosette leaves and cauline leaves. Expressed in stipules, trichomes and hydathodes. Expressed in pollen grains. Bushy plants with small leaves, short roots and short inflorescences containing a higher number of stems. Alteration in pollen grain development, high number of aborted siliques and few siliques with low number of seeds. Cotransport is inhibited by the loop diuretic bumetanide. Belongs to the SLC12A transporter family.