On Thu 15 Sep 2005 02:12:20p, harold balls wrote in alt.home.repair:
LOL! I hear you. Actually, I don't disagree with you at all. I was only pointing out the premise of their recommendation. Let's just say that the indicator light is for "dummies" and it's probably best that people who don't have a clue follow the prescribed recommendation. For those who can perceive the difference in flow and/or taste, then that is probably the best guide.
As to the "two week" recommendation, that is as much for health reasons and CYA as anything else. When the filter doesn't have a frequent flow, in certain environments it is possible for bacteria or other organic contaminants to multiply.
Back in the late 1960s, the Heater Division of Eaton Corp. developed one of the first activated charcoal water filters for residential contertop use. The activiated charcoal cartridge in this filter was significantly larger than any of those currently installed in refrigerators. Their general recommendation in their literature was to change the cartridge annually.
Just my 2 cents.
Cheers!