If your plumbing sounds like a foghorn, something is likely wrong with your plumbing. Depending on where the sound is coming from, it could be something important or tiny. To get rid of the humming sound from the pipe and avoid any harm to your plumbing, you should have it checked.

How To Fix Pipe Sounds Like Foghorn


Here are some of the reasons why your pipes sound like a foghorn.

  1. Toilet

Foghorn sound coming from the toilet is one of the most typical sound problems you may encounter. If you hear a foghorn sound every time you use the toilet, it's likely that the ballcock valve inside the toilet is malfunctioning.

This is because the ballcock loses its ability to seal the valve properly as it ages. This causes friction and a shudder, which is usually the cause of the loud sound. Another cause could be a loose or broken washer inside the assembly.

  1. Faucets

If you hear a constant sound when you open the faucet, it could be the faucet washer. When a loose faucet washer is exposed to water, it can also make a loud noise. The first step should be to tighten all of the faucet screws and listen to see if the noises stop. If nothing happens, you'll need to hire a plumber because the situation could be more serious.

  1. Washer

Strange noises coming from the dishwasher or washer can sometimes be heard. This is due to the fact that they fill with water, indicating a valve problem. If left unchecked, this sound will become louder and louder, eventually resembling a foghorn.

Most likely, the issue is a worn-out and old solenoid fill valve. The trouble is that, unlike the toilet, this valve is difficult to reach and may not be reachable with just your hands. You may need to hire a professional to assist you with this and, as a result, with the sound.

Another thing you may do is make sure the valve does not approach the point of no return. If you have a little problem, address it immediately rather than allowing it to worsen.

  1. Water Heater

If you hear foghorn sounds come from water heater, it's likely that something is wrong with it and it needs to be fixed.

To begin with, any sound, whether soft or loud, can be alarming and should be addressed as such. Mineral accumulation on the burners is the most likely issue here. The foghorn sound you're hearing is water trapped in these sediment layers. This is, in fact, a regular issue with hard water.

You should cleanse your heater once a year to avoid this situation. In order to protect their plumbing, many also install a water softener.

  1. Water Supply Lines

If you hear a foghorn sound, double-check your water supply lines. If you reside in an older home, you may have problems with the supply lines because they aren't properly secured.

Water hammers form as a result of this. In most circumstances, securing these pipes with plumber's tape should be enough to solve the problem. If the situation persists, a plumber may be required to repair the pipes.

  1. Wall

If you've examined all of the above and are still having trouble determining the cause of the noise, you might want to consult a specialist. You may be perplexed and believe the sound is coming from all directions, yet you will still be unable to locate the source. A plumber would be really useful in this situation.


If you hear your plumbing sounds like a foghorn, check the list above that a plumber will usually do in such a situation:

  • Are your pipes old and worn out?
  • Are there any brackets holding the pipes in place? Pipes that are loose are frequently a source of concern.
  • A plumber will also listen for noises coming from the pressure regulator. If it is the source of the problem, you must be willing to replace it.


Here are what you can do how to fix a hammering sound in a water pipe.

  1. shutting off the main water valve
  2. turning on all taps and draining the entire house
  3. tightening the screws


If you hear a fog horn noise when flushing toilet, try this to fix it:

  1. Open the toilet tank and flush the toilet. Lift the float ball all the way to the top of the tank when the valve starts generating the foghorn noise. If the noise stops, the ballcock mechanism has a loose or worn washer.
  2. The top of the fill valve should have three screws. If they're visible, the valve isn't sealed and can be disassembled. Turn off the water and flush the toilet to empty the tank before you do anything else.
  3. With a screwdriver, remove the three screws and lift the ball, armature, and top of the flush valve out of the tank. Remove the washer from the valve's bottom and replace it with a new one. Reassemble the valve, turn on the water, and be sure the noise has gone away.
  4. If the valve is sealed or if replacing the washer didn't stop the noise, replace the valve. Turn off the water, flush the toilet, and use a sponge to transfer all of the residual water in the tank to the toilet bowl.
  5. Disconnect the water supply hose from the valve connector under the tank and release the valve locknut with adjustable pliers. Remove the old valve from the tank by unscrewing the nut and lifting it out.
  6. Install a new valve after correcting the fill level if necessary and following the manufacturer's instructions. Tighten the locknut with the pliers after it has been screwed on.
  7. Connect the water hose to the new valve's connector, turn on the water, and let the tank fill. Adjust the float to bring the water level to within an inch of the overflow tube's top.

Foghorn-like sounds might also signify other issues. Excessive water pressure in the pipes or inadequate insulation are examples.

As a result, it is recommended that water pressure in one's home be kept at a tolerable level and not allowed to get too high. Water pressure of less than 80 psi is considered ideal for residential use. At all times, make sure that any copper pipes are adequately insulated.

If you've determined that the problem is with the copper pipes, lowering the water pressure can help a lot.