What is water hammer and how to prevent it

 What causes water hammer

First of all, it is essential to know what you are dealing with. Water hammer occurs when a water valve is suddenly closed, causing a shock wave that knocks pipes against walls or each other. This can happen in washing machines, dishwashers, bathrooms and sinks.

Is water hammer just a residential plumbing problem?

No, water hammer is not limited to residential plumbing. Large installations, such as factories, municipal waterworks and power plants, are also susceptible to water hammer. In these contexts, the potential for damage can be significant and requires specialised water hammer mitigation strategies.

Are some homes more prone to water hammer?

Some homes are more susceptible to water hammer, particularly older homes with outdated plumbing systems that may not include modern water hammer prevention devices such as air chambers or drains. Homes with high water pressure are also more susceptible, as higher pressure can lead to a higher water hammer impact. However, it is important to note that water hammer can occur in any house, regardless of age or design.

Can water hammer cause damage to plumbing?

Yes, water hammer can indeed cause significant damage to plumbing systems over time. The sudden pressure surges that are created can strain pipes, causing joints to loosen, leaks or even rupture. This is of particular concern for older or weaker pipe systems. Repeated water hammering can also damage appliances connected to the plumbing system, such as washing machines and dishwashers, by stressing their internal components.

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