The Grundfos 98420224 UP10-16APMBU/LC Recirculation Pump is a compact circulator designed to maintain continuous hot water circulation in compatible hydronic heating and domestic hot water systems. It operates by moving water through the piping loop, reducing waiting time for hot water and supporting consistent water distribution. Suitable for compatible boilers, water heaters, and hy... https://www.partshnc.com/98420224-grundfos-up-10-16-a-pm-bulc