The answer to 'pressure regulator making noise' is that a noisy pressure regulator is often caused by mineral buildup, worn components, or high water pressure. Symptoms may include a whistling, hissing, or thumping sound coming from the regulator. To fix this, you may be able to clean or replace the regulator yourself, but in some cases, it's best to call a professional plumber.
Pressure regulators help control the water pressure entering your home, protecting your plumbing from damage due to high pressure. If the regulator is making noise, it's a sign that it needs maintenance or replacement. Trying to fix it yourself can be risky if you're not experienced, as improper installation or adjustment could lead to leaks or even burst pipes.