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Plumbing System

Why does your plumbing system corrode?

Have your pipes ever corroded so badly that they became brittle and simply fell apart? It is a common problem that can cause severe water damage in your home and cost you money to correct. Many pipes corrode because two different metals were joined together to form a connection.

If you're installing a plumbing system, did you know that you should always use pipes and joints made of the same kind of metal?

When different metals are used together, one of the metals will corrode - sometimes very quickly. For example, if copper water pipe is connected to a steel water main, the steel pipe will corrode. Corrosion caused by the contact between different types of metal in a wet or moist atmosphere is called galvanic corrosion.

Where will you find corrosion in your plumbing?

You may find galvanic corrosion throughout your plumbing system. Common examples include:

  • A steel screw in a brass faucet
  • Copper water pipes contacting a steel or iron pipe (for example, on a gas main)
  • Brass fixtures connected to steel pipes
  • Copper fixtures connected to steel pipes
How can you control corrosion?
  • Use the same metals for plumbing connections.
  • If you cannot use same metals, place a plastic or fiber connector between the joints to prevent the metals from touching.

 
 
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