Manufacturers ask us to change our water filters in our fridges every 6 months and this is why….
Most refrigerator water filters, which meet NSF/ANSI 42 certification standards, use granular activated carbon (GAC) to attract chemicals and impurities responsible for bad taste and odour.
These filters are not capable, however, to rid water of more dangerous, health-threatening contaminants. The method by which water is channelled through the filters does not allow sufficient time to complete the absorption of the bad substances. So Various bacteria are formed, trapped and allowed to multiply, which further contaminates water processed by the filters.
Carbon is not capable to absorb heavy metals, such as lead. GAC filters may trap some heavy metals and sediments, but allow others to filter through to the output water.
Failure to change the water filter, every six months, allows unabsorbed water contaminants and newly formed bacteria to saturate the filter, forcing the filter to leak contaminants back into processed water.
The water output may contain more contaminants than the filter was intended to remove in the first place.
If you don’t change these filter you are going to be consuming bad contaminants which could have serious adverse effects on your health
Be safe change you filters every six months & buy a quality filter that meets the NSF/ANSI 42 certification standards which are usually the original manufacturers parts.
There are many cheaper copy versions on sale on ebay, which you might believe to be a bargain, just be carefull and check they pass the relevent standards or go with the original manufacturers parts to be sure.