Water treatment producer Amiad Water Systems has announced its Chairman Tal Yeshua will be stepping down from his role after six years of service to concentrate on his other interests.The effective date of his exit will be announced after the appointment of a successor at the next general shareholders' meeting of the company.Yeshua, Chairman, said: "It has been a privilege for me to work alongside Arik Dayan and implement unprecedented change in the company that has seen it transformed into a major global player. I look forward to watching the continued progress of the company."As of 10:20 the share price was unchanged at 270p.WS