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Why Is My Toilet Flushing So Darn Noisy?

//Why Is My Toilet Flushing So Darn Noisy?

Why Is My Toilet Flushing So Darn Noisy?

Your toilet has become noisy and you don’t know why.  Oftentimes, your toilet assembly may only need a thorough cleaning, but there also times when you may need to replace one or more parts. To help troubleshoot the problem, we’ve broken it down into categories to help determine what the problem is.

What You Hear:


Referred to as a water hammer, you may hear this noise when the valve closes suddenly at the end of the pipeline, which causes pressure in the pipe. The pressure can cause problems ranging from loud noises when you flush to pipe collapse.


One of the most frequently asked questions is, “What causes that hissing sound in my toilet?” The continuous hiss you hear could be a faulty refill valve. When the valve doesn’t turn off, the hissing sound comes from the high-pressure water that passes through the restricted fill valve as it enters the tank.  This causes vibrations, which result in the hissing sound you hear.


When dirt and debris get stuck in the fill valve, you may hear a whistling sound when you flush. This could be caused by water pressure running across the dirt and debris or there may be a leak in your toilet fill valve causing water to escape.

If you’re an DIY’er, fixing this problem is relatively easy. Simply turning off the water supply, removing any dirt from the cistern or adjusting the valve by hand usually rectifies the problem. On the other hand, if you’re not well-versed in plumbing, it’s a good idea to call a plumbing specialist.


If you hear a low vibrating noise coming from the back of your toilet when you flush, a faulty fill valve may be the reason. Over time, it’s not uncommon for fill valves to go dry out and break. When this occurs, the valve often makes a rattling sound. If you lift the toilet valve’s arm and the vibration noise stops, you know you’ve a problem. It may be time to call a plumber and replace the mechanism.

High Pitched Scream

If your toilet makes a high-pitched screaming noise when it’s refilling, it may be caused by excessive water pressure. Typically, water pressure should be approximately 50 pounds per square inch.

Whether it’s a noisy toilet or any other plumbing problem, you can trust Roto-Rooter. With over 80 years experience, Roto-Rooter is available 24/7 to take care of your plumbing needs. Book online or call today to schedule an appointment. We’re here when you need us most!

By |2017-05-01T17:45:22+00:00May 19th, 2017|Uncategorized|0 Comments