The answer to 'faucet installation won't flush' is that there are a few common causes, including a blocked or clogged faucet aerator, a problem with the water pressure, or an issue with the internal faucet mechanism. The most likely culprit is a blocked or clogged aerator, which can restrict water flow and prevent proper flushing.
To troubleshoot, first try removing and cleaning the aerator. If that doesn't resolve the issue, you may need to check the water pressure or look for any internal faucet problems. In some cases, the faucet may need to be disassembled or replaced to fix the underlying issue. For more complex problems, it's best to call a professional plumber who can properly diagnose and repair the faucet.