I didn't complete the entire original survey because I have not had the filter installed. Now seeing how it worked so now I'm able to give you a summary for Adolph Schwatz team that came over to install the water. The installation was as straight-forward as the presentation. In this COVID-19 PANDEMIC, FILTERE OUT THE VIRUSES. THIS ENTIRE PROCESS WAS QUICK, TO THE POINT, AND TOTALLY HEADACHE FREE.