As far as I know, about all water filters - Berkey, Life Straw, Sawyer, etc.. - are damaged if they are wet and freeze.
What if it is winter with several days of temperatures in the teens and the grid is down and your supplies of natural gas, gasoline, and propane are gone?
What is your plan?
What if it is winter with several days of temperatures in the teens and the grid is down and your supplies of natural gas, gasoline, and propane are gone?
What is your plan?