So far, so good. I've been replacing them for years now and the quality seems to be slowly but steadily declining. The original cartridges lasted several years, replaced at most a year. And that's the goal now, the last few months. American Standard gives a "lifetime" warranty on the faucet, but the recurring expense of cartridges eventually made me switch fixtures. There are only two left. For $15 shipping I'm missing the 50 cent rubber washers.
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