Enables sodium:potassium:chloride symporter activity. Involved in several processes, including chloride transport; metal ion transport; and protein insertion into membrane from inner side. Located in apical plasma membrane and cell surface. Human ortholog(s) of this gene implicated in Bartter disease and Bartter disease type 1. Orthologous to human SLC12A1 (solute carrier family 12 member 1). [provided by Alliance of Genome Resources, Apr 2022]