The answer to 'pipe repair making noise' is that there are several common causes for pipes making noise after a repair, including improper installation, air pockets, or loose connections. Symptoms may include banging, whistling, or vibrating noises coming from the pipes. Solutions can involve adjusting the pipe, removing air, or tightening connections, but in some cases a professional plumber may be needed to properly diagnose and fix the issue.
Pipe repairs should always be done carefully to avoid creating new problems. If you're not confident in your ability to properly repair the pipe and eliminate the noise, it's best to call a licensed plumber to ensure the job is done right.