The SmartLoop system helps maintain water quality by maintaining temperature and reducing water stagnation. Ideal for use in multi-story commercial applications, the product uses a supply riser to insulate the internal recirculation line tubing, significantly reducing return line heat loss. The system offers several advantages including energy and water consumption savings potential of up to 40 percent. The installation requires no separate return pipe, uses less insulation and fewer fittings, supports, penetrations and core drilling than a conventional recirculation installation. Viega.