How to silence noisy, vibrating and rattling water pipes (2023)

When you open some faucets, do you hear the sound and vibration of the water pipes? Are you afraid of waking someone up in the shower with the sound of a hookah? There are several reasons why water pipes rattle or vibrate, but there are ways to calm them down.

How to deaden noisy and vibrating water pipes:Make sure the tubes are secured with anti-vibration clamps and that the clamps are secure and spaced correctly. Wrap the tubes in foam to avoid squeaking when passing through other materials. Make sure the lines are supported and have flexible room for expansion and contraction. Reducing the water pressure or installing a hammer guard can also stop the noise.

In this article we look at what causes water pipes to rattle and vibrate. We also discuss how you can prevent these noises from disturbing your quiet home. After reading this article you will better understand how to muffle noisy water pipes.

For information on how to mute other home infrastructure, see our articlesHow to silence a loud oven fan,How to muffle a noisy air return.

How to silence noisy, vibrating and rattling water pipes (1)

What causes hookahs to vibrate and knock

Plumbing is an essential part of the plumbing system in most buildings. They are usually made of metal, PEX (cross-linked polyethylene) or other non-metallic pipes and deliver or remove water where it is needed. Often the plumbing system consists of a mixture of piping materials.

Water pipes run through or along walls, ceilings and floors. Exposed pipes are easier to inspect and repair. Unfortunately, most of the plumbing is hidden within the structure of the building, making maintenance difficult and expensive. Piping that bypasses or runs flush with components is often the source of rattling and vibration.

Identifying what is causing the noise and where it is occurring is only part of the problem. It can be more difficult to determine why the tubes are making the annoying noise. Here are some possible reasons tubes can produce mixed sounds.

high water pressure

High water pressure can cause leaks, constantly leaking toilets, splashing faucets and plumbing that pops, pops, hisses, squeaks, rattles and vibrates as faucets are turned on or off or the toilet is flushed. Excessive water pressure can make the pipes noisy. It can also damage water pipes, joints and bends, faucets, fixtures, and even washing machines and hot water tanks, which can result in costly repairs. moreover, it is a waste of water.

You may feel that high water pressure is essential for a good shower or to improve water flow. Proper water pressure, however, still produces cleaning power; it just won't pull the skin off like a water pick.

(Video) Why is My Plumbing Making Noise? - Real Plumber Real Answers

loose tubes

Water lines can make noise if not secured or properly supported. Vibrating water pipes are often loose or not securely attached. Noisy water lines often lack support or mounting brackets. When faucets, toilets, or appliances are turned on, flushed, or turned on, water flows through the pipes to meet demand.

The force and movement of the water causes the pipes to bend and move, causing them to vibrate, rattle, rumble, or squeak. The same can happen when the water is shut off and the pipes are returned to their resting position. Loose pipes make more noise than tightly connected pipes.

trapped air

Air trapped in pipes due to recent repairs or a faulty valve can cause faucets to splash and pipes to vibrate, rattle, or slam. Trapped air can also create an air hammer if it collects in a faucet. The trapped air is under water pressure, and when the faucet is suddenly turned on, it shoots out like an air gun.

The sudden release often causes water to slam against closed valves and faucets elsewhere in the building, creating a rumble of water pressure. In addition, water movement can cause the pipes to move, adding a rattling, knocking, or vibrating sound to the myriad of sounds.


Water hammer is caused when a faucet is turned off quickly, causing a loud pop, followed by quieter pops for a short time. The water in the pipes is not compressible. If the valve or faucet is closed quickly, the water will bounce against the valve. The momentum and velocity of the fluid creates a hydraulic shock or hammer.

Water falls into the suddenly closed faucet, pushing it back and creating a vacuum in the closed valve. The vacuum pulls the water back against the valve with a quieter rumble. This cavitation continues with increasingly quieter rumbles until the water stops moving.

temperature changes

Hot water can expand pipes, and cool or cold water can cause them to narrow. Heating or cooling motion can cause pipes to rub against structural members or supports, causing vibration, rattling, or squeaking. This is especially true for copper tubing, which is ductile and malleable. But flexible plastic hoses like PEX can also make similar noises.

(Video) Water pipe rattling?

This will prevent water pipes from vibrating and slamming

Vibrating and rattling water pipes say something about the water supply system. The location and cause of the noise aid in healing. Some solutions are easier than others and cheaper, while others may require more work and experience. It's hoped opening a wall or ceiling won't be necessary, but it's a possibility depending on where the vibrating and noisy water pipes are.

Let's take a look at five common causes of noisy and vibrating water pipes:

1. High water pressure

How to silence noisy, vibrating and rattling water pipes (2)
The high water pressure causes the pipes to bang, vibrate, rattle, squeak, hiss and bang. It can also damage washing machines, dishwashers, hot water tanks, faucets and pipes. It might be great in the shower, but dozens of leaks at seams and joints might not be a shower to your liking.

The first step is to determine if the water pressure is too high. Rent or buy one. It needs to be screwed onto a household faucet, so you need an adapter. The cost should be under $20. Remove the aerator from a faucet, screw on the gauge and open the faucet.

The water pressure should be between 40 PSI and 60 PSI. Building codes call for less than 80 PSI, so if it's higher, the pressure needs to be reduced.

To adjust the water pressure, go to the water pressure regulator. It is a valve, usually with a pressure gauge, that is used to adjust the pressure and should be located just after the water meter near where the service water line enters the house. If you don't have a regulator, install one or make it yourself if you have the skills and time.

A plumber doing the installation will also adjust the water pressure as part of the task and will likely show you how to do this in the future if needed. I would recommend installing one with a pressure gauge attached.

To adjust the water pressure, locate the main water shutoff valve and slowly twist or turn it to the closed position.

Locate the regulator screw and locknut. Back off the locknut 1/4 turn at a time until the screw turns. Turn the screw clockwise to increase pressure and counterclockwise to decrease pressure. A quarter turn is a good start.

Slowly turn the main water valve and check the water pressure. If it's still too high, turn the power back off and turn the screw another quarter or half turn in the correct direction.

Repeat until pressure is below 60 PSI. To secure the adjusting screw, tighten the locknut on the regulator with a wrench.

(Video) How to Fix Banging Pipes / Water Hammer

2. loose tubes

Noisy, vibrating water lines may not be properly supported or attached to structural members. Horizontal pipes should be placed every 6 feet to 8 feet and vertically every 8 feet to 10 feet. The pipes in many houses are secured with brackets held together by nails. Over time, the bolts will loosen, causing the pipes to rattle, vibrate, squeak, or pop when water flows through them.

Exposed lines in basements or in shell construction are easier to check and secure. Ensure that existing brackets are properly secured with screws. Never use galvanized supports on copper pipes as this will cause corrosion and leaks.

To minimize vibration or noise from noisy water pipes, use plastic or nylon clamps, or wrap the pipe around the cap with a piece of foam, rubber tubing, tubing, or tape. The clamp should be snug but allow the water lines to expand and contract.

Tubes can have adequate support but still feel loose. Add extra supports or supports every 3 or 4 feet. For loose tubing in service ducts, consider wrapping 4-foot sections in tubing insulation to minimize noise. The foam prevents the pipes from hitting each other and also the sides of the duct. It also insulates the hot water pipes from the cold.

If the loose pipe noise is coming from inside a wall, use foam or rubber pipe insulation to wrap the pipe where it goes through the wall. It must prevent the line from vibrating against the edges of the hole. Also, filling and sealing the hole around the pipes will prevent noise from inside the wall from resonating out of the opening.

If the pipe-to-wall noise is still bothersome, call a professional or open up the wall. Alternatively check the water pressure and reduce it by 5-10 PSI to reduce the force of the water in the pipes and hopefully the noise.

3. Trapped air

Air trapped in water pipes can cause faucets to splash and pipes to slam, vibrate, slam, or squeak. Air may have entered the service water line from service lines outside or inside the building. If there are drafts that only occur when a faucet is turned on or off quickly, turn the faucet off more slowly or replace the faucet with one that doesn't open or close as quickly.

To purge the air from your home's water supply system, follow these steps:

Make sure the main water valve, located in front of the water meter or where it enters the building, is fully open.

Open the faucets from those closest to the main supply point, to those on the highest floors, or farthest from the supply valve. They run hot and cold faucets everywhere to keep the water running, including outside faucets. You just have to open them to half the volume.

You can use buckets or hoses to prevent your outdoor faucets near your home from flooding. Rinse and rinse the washing machine and dishwasher and fill a jar with fridge dispensers.

(Video) Banging noise from water pipe

Run the water for 10 to 15 minutes or until it runs smoothly without splashing or making noise.

Turn off all faucets in the reverse order that they were opened so that the farthest one is closest to the main water shut-off valve. Wait about 2 minutes between turning off each faucet. Also rinse next to it after turning off the faucets.

If spraying continues, there may be an air leak somewhere in the building's water system and you should contact a plumber.

4. Water hammer

Water hammer is caused when a faucet is turned off too quickly, creating a rumble or a surge of water that can crack pipes, faucets, and even appliances. Modern washing machines and dishwashers have solenoid valves that also close quickly and can also make a bang.

The burst or rumble generates 100 PSI and can damage pipes, fittings, faucets and appliances including water heaters as one burst of water can exert pressures of hundreds of PSI. Copper tubing also produces a louder bang than other tubing materials.

Check the pressure control valve and reduce the pressure by 5 to 10 PSI. It can solve the noise and save time and money.

If reducing the water pressure does not resolve the rumble, install a shock absorber or mini rim shock absorber in the flexible water line between the mount and the wall or back of the case. A lightning rod is an air chamber made with a sealed chamber and membrane.

Excess water pressure pushes on the diaphragm and expands into the sealed chamber, absorbing it and preventing hydraulic shock. You may need a hammer stopper on the hot and cold water lines for the faucet.

5. Temperature changes

Hot and cold water can attack metal and plastic pipes, causing them to shift in brackets or rattle and vibrate when in contact with other materials. Even air temperatures around pipes can have similar effects.

To avoid noise caused by temperature changes, make sure the tubes are properly fixed and supported. Add extra braces or supports if the pipes seem to be moving a lot.

To minimize noise, wrap the pipes where they pass over supports or supports. Insulate the pipes with pipe wrap or neoprene foam pipe insulation to protect against temperature fluctuations and noise. Temperature can affect the length, diameter, and stiffness of tubing, regardless of what material it is made of. It can also affect how much pressure the hoses can withstand.

(Video) Pipes Rattle After Flushing Toilet

A hundred feet of PVC pipe will shrink or expand approximately 3/8 of an inch for every 10°F change in temperature. The copper pipe changes by 1/10 inch under the same conditions. So if the water in the line is 55°F and changes to 120°F, that 65°F change can cause the copper pipe to be more than 3/5″ longer and PVC to stretch 2-3/8″ .” Your house may not have as long pipe lengths, but temperature changes will still cause pipes to squeak.


Adding extra brackets and supports, wrapping pipes where they come into contact with other materials, and insulating those pipes is an easy fix to quietly vibrating and squeaking water pipes. Adding a water hammer suppressor is also another possible DIY means of controlling plumbing noise.

I hope you have a better understanding of what can cause noisy water pipes and how to silence them. If you found this article helpful, please share it with others. Your comments and suggestions are always welcome.


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