Grains for each gallon is how your water hardness is calculated. You will see the abbreviation for this (GPG) in relation to the maximum hardness removing range for each water softener. The upper the GPG, the upper the grain capacity you will need. We consider a good plumber is clean https://plumbing-salinas-ca21097.therainblog.com/28994704/5-simple-techniques-for-gas-lines