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Water Hammering Noise

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 Water hammering noise coming from house pipes




Several factors exacerbate water hammer and are generally traceable to inadequate system design

and installation. These include:

- Improperly sized supply lines for given peak water flow velocity
- Excessive system water pressure and lack of pressure-reducing apparatus
- Inadequate strapping or securing of plumbing to structure
- Excessively long straight runs with no bends
- Lack of expansion tank or other dampening system



-  Water makes more noise as it moves faster through the pipes. Replacing the pipes with larger pipes will

   reduce or even eliminate the noise you can hear. But that is a huge undertaking.


-  Install/replace a pressure reducing valve which involves a moderate to high level of plumbing skill, you

   may want to hire a plumber for this if you are not experienced with plumbing.


-  Installing insulation on the pipes may help reduce the noise. Loosening straps that hold the pipes in place

   may also reduce the noise by allowing the pipe to slide easier as it expands and contracts.

- Turn on all the faucets in the house and then flush all the toilets, give it a few minutes to push that air out.

If you know where the water supply comes into your house turn off the faucets starting with the one closest

to the water supply entry point, then close them one at a time moving away from the entry point. As you

come to a toilet when you are moving through the house turning off faucets, flush it again, then wait two

minutes before closing the next faucet. Don't forget the faucets on the outside of the house! An air chamber

will not drain properly if it is clogged. Remove its cap and ream out the accumulated scale inside the chamber.

If this procedure did not help try installing a water hammer stopper.

- Water hammer is influenced by three variables, understanding these variables will help you find the source

of your water hammer problem. The first variable is the length of the pipe the water is traveling through. We

can't do much about the length of you pipes, assuming you can't move your house closer to the water source.

But it is an important factor in creating water hammer, so it is useful to take a look at it, especially as it relates

to the pipe size. For example, in some situations you can force a high rate of flow through a small pipe without

problems, provided the length of the pipe is short, say, a few feet. The shorter the pipe, the smaller it can be.

Knowing this will help you determine the cause.


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