The best way to gauge when to replace the Berkey PF-2™ Elements is to do the following:
- Keep a track of how many times per week you need to refill your system.
- Then multiply that figure times the capacity in liters of your particular system (for example the Berkey light system is 10.40 liters) to determine total liters used per week.
- Finally divide the total liters used per week into the 3.785 liters and that will tell you how many weeks before the filters should be replaced.
- Next calculate the future date for replacement (52 weeks per year) and write that date on a sticker and attach it to the bottom of your system for future reference.