EWT customer area: I Login I Logout The EWT company Products EWT: People and services! The company EWT was created in 1994 by Messrs Alain Tourret and Pierre Nicolas. Very quickly the company takes off by basing its development on the sale of softeners by constantly seeking innovation and the quality of the equipment offered. Learn more> Hard water promotes tartar Water softening involves exchanging calcium and magnesium ions for sodium ions, the salts of which are perfectly soluble in water in an operation called ion exchange. The softening ion exchange is carried out on a solid support consisting of ... Learn more> Our products: CK valve Power Koala ® Pollet Water Group Realized by IDGCOM