The answer to 'when to replace faucet installation' is that you should typically replace a faucet every 10-15 years, or sooner if it starts leaking, dripping, or malfunctioning. Faucets are exposed to a lot of daily use and wear over time, so it's important to replace them before they cause damage or become a nuisance.
Some key signs it's time to replace a faucet include dripping water, difficulty turning the handles, mineral buildup, or rust and corrosion. If you notice any of these issues, it's best to replace the faucet rather than trying to repair it, as the underlying problems will likely continue. Replacing a faucet is also a good idea if you're renovating your kitchen or bathroom to update the style and functionality.