Why is my toilet so loud when refilling but

A noisy toilet can be more than an annoyance—it can disrupt your sleep and potentially signal underlying plumbing issues.

Fortunately, you can resolve many toilet noises with some basic DIY skills and a few simple tools. In the video above, This Old House plumbing and heating expert Richard Trethewey shows how to diagnose and fix a persistently noisy toilet by replacing the flush valve.

Common Causes of Toilet Noise

If your toilet makes unfamiliar sounds, you might have problems with your fill valve, flush valve, or other loose parts.

Faulty Fill Valve

The fill valve controls the water flow into the tank after flushing.

If it’s malfunctioning, it can cause a variety of noises, including the following:

• Hissing or whistling sounds
• Loud banging when the tank refills
• Whining after a flush

Worn Flush Valve

A worn or damaged flush valve can lead to water leaking from the tank into the bowl, potentially causing issues like the following:

• Cons
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  toilet loud hissing when filling