The Grundfos UP26-99SF (Grundfos SKU# 98961762) circulator incorporates stainless Steel pump housing for enhanced corrosion resistance and is designed for use in heating, hot water recirculation (domestic), solar applications, chilled water cooling and many others. Grundfos UP26-99SF model is a single speed circulator and high head / high flow parameters, making it ideal for residential projects of all sizes and smaller commercial applications.