The chemical abnormalities relate to the type of stones that form in the kidneys. These four types of stones and the chemical abnormalities that cause them are: Calcium Stones: people who form this type of stone either have too much of one type of three chemicals in their urine, or not enough of another.
Therefore, we recommend replacing your refrigerator's water filter typically every six months or when the gallon capacity is reached. We offer compatible replacements for Whirlpool refrigerator water filters, Kenmore, Frigidaire, Samsung, LG, Maytag and other popular refrigerator brand water filters.
Faucet Filters. Replace your PUR faucet filter every 100 gallons or approximately every two to three months. An indicator on the filter housing alerts you when the filter needs to be changed. To change the filter, remove the housing cap, pull out the old filter and install the new filter in the same direction.