The PUR water filter can filter up to 100 gallons of water, which equates to about 3 months.
If your drinking water consumption is higher than average, or your water contains a high amount of contaminants, your PUR filter might not last this long. On the other hand, if you use less drinking water per week than PUR water filters are intended for, your water filter might last longer than advertised.
Note that the PUR faucet filter systems have a filter change light that indicates when you need to change the filter. This can be handy, but it won’t be entirely accurate to your situation.
This filter change light isn’t smart enough to actually detect when the filter needs changing. It just acts as a timer, counting down 3 months from the date the filter is installed. Factors such as your own drinking water usage and your maintenance habits won’t be recognized by the faucet mount filtration system.
The filter change light on your filtration system will move from green to amber to red to display how long your PUR water filter will continue to work for. Once the filter change light switches to red, you’re advised to change the filter.
But if you’ve been cleaning your PUR water filter regularly, you might get another couple of months out of the filter before it needs to be changed. Use your instincts and take into account the quality of your water and your flow rate.