The Rinnai 104000234 PCB Kit with Pump Logic regulates pump operation and supports the electronic processes of compatible water heating systems. This printed circuit board assembly processes electrical signals and coordinates pump activity with the heater's operating sequence. Designed for specified 120/250V, 10A electrical requirements, it communicates with connected components to su... https://www.hnkparts.com/104000234-rennai-kit-pcb-rl75ea-vc-wpump/4-104000234.html