Practical tips
- A loud bang when a faucet or washer shuts off is often water hammer from fast-closing valves.
- Listen for where the noise starts; loose pipes in a crawl space or wall can rattle against framing.
- Whistling or squealing often comes from a worn valve or fill valve in a toilet.
- If noises get worse or you see leaks, ask a plumber to test water pressure and secure loose lines.