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Old 01-01-2010, 17:53   #153
Join Date: May 2002
Posts: 2,939
No reason to replace them more than every 5 years or so. They'll function indefinitely, but it's cheap to replace them every 5 years or so, even though it's not really necessary. And if you're looking for good info, the internet isn't necessarily your first choice, to go further, if you're looking for good info on the internet, getting advice on whether replacement is necessary from the website of a company that sells replacements is ludicrous.
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