PORTLAND, Maine - Hydro International will showcase its full line of products addressing grit removal and combined sewer overflows at the WEFTEC 2007 conference in San Diego on Oct. 15-17.The WEFTEC conference, hosted by the Water Environment Federation, is the largest conference addressing water quality issues in North America. The annual event attracts more than 18,000 attendees and more than 1,000 exhibitors.