The answer to 'faucet installation won't flush' is that there are several common causes, including a clogged aerator, a problem with the faucet's internal mechanisms, or an issue with the water supply. Symptoms may include low water pressure, dripping, or the faucet not turning on at all.
In many cases, the issue can be resolved with some basic troubleshooting and DIY repairs. However, if the problem persists or you're not comfortable making the repairs yourself, it's best to call in a professional plumber to diagnose and fix the issue.