When they aren’t working perfectly, toilets let you know by hissing, squealing, banging, and moaning loudly. Odd toilet noises have a number of causes —from water-flow issues caused by debris and clogs in your plumbing to failing tubes and valves in and around your toilet—which is why it’s important to identify the specific sound and diagnose the problem before you start disassembling and swapping parts.
If your toilet is squealing or whistling after you flush, you’re probably facing a failing fill valve. The fill valve controls the amount of water that refills the tank, and it can wear out and need adjusting or replacing to keep your toilet flushing smoothly. Here’s how to silence your toilet with a new fill valve. Toilet Tub
The only part you’ll need for this job is a new fill valve, which you can get from Amazon or any home improvement store for about $15. DIY YouTuber Jeff Ostroff has a helpful video for replacing a toilet fill valve if you need visual instructions, but here’s the step-by-step:
Toilet Supplies Ostroff also notes that this is a good time to assess the water supply hose. If you have a rubber line, consider replacing it with a steel hose. If it’s steel but worn out, rusty, or green, also replace it.