Replacing Old Pipe Supports: When you run hot water through your pipes, they can expand and cause them to bang against your pipe supports. If this happens in your home, you can easily solve the problem by installing plastic pipe clamps that allow expansion without a loud groan.
Your water pressure is too high
When the water pressure in your home becomes too high for the capacity of your plumbing system, your plumbing may make a groaning, hissing, or humming noise.
Water pipes that make a groaning or hissing sound often indicate a narrowing somewhere in the waterline. When the water flows through the narrower section it makes this sound. This problem is common in faucets and toilets as washing machines and internal fittings wear out.
A foghorn sound on your lines can have several causes. It could be a broken ball valve in the toilet, a loose washing machine faucet, or a valve on the washing machine. It can also permeate your entire home, in which case it could be from loose or old plumbing or a malfunctioning regulator.
If you hear a vibrating sound coming from your pipes when you flush the toilet, this usually indicates a problem with the fill valve. This piece is the part of your toilet that fills the water tank. It may also sound like a foghorn or a groaning noise that lasts about 30 seconds after flushing.
Turning off all valves in bathroom pipes. Closing the valves while the pipes are making the hum allows you to identify the source of the problem and take the necessary action. Replacing the toilet flap. Replacing the rubber stopper at the bottom of the toilet tank will help stop the hum.
Popping noises coming from your pipes usually indicate a problem with the water flow or water pressure. Two of the most common causes are water hammer and trapped air bubbles. Water hammer, also known as hydraulic hammer, occurs when a fluid in motion is suddenly stopped when a faucet or valve is closed.
A high-pitched whistle coming from the pipe is caused by excessive water pressure or excessive flow rate. If your water pressure exceeds 60psi, chances are the pipes are making a high-pitched noise. The simple solution to shrill plumbing noises is to lower the water pressure to a reasonable level.
The popping sound you hear is the result of vibration in pipes. The vibrations are caused by a pressure surge in the piping system when a faucet or valve is opened. Sometimes water hammer can occur when a vacuum forms behind water.
If your toilet is making a foghorn noise, it could be due to a loose washer inside the “float” – a black ball valve common on older units. Lift the gas cap and flush your toilet while holding the float up, and when the foghorn sound goes away, you’ve located the problem.