Glass-Fused-to-Steel Potable Water Tanks: NSF/ANSI 61 Certified Municipal utilities and industrial operators across municipal water utilities face the same pressure: store potable water safely, satisfy tightening environmental and safety rules, and keep the asset in service for decades. A liner that blisters, a seam that weeps, or a coating that quits turns a storage asset into a compliance liability and a maintenance sink. Engineered by Shijiazhuang Zhengzhong Technology Co.