What is CSST?

csstWhat is CSST? CSST stands for: Corrugated Stainless Steel Tubing. If you look at the picture to the left, you will see an example there. CSST is a great product, but there are some things to keep in mind.

First, CSST is not generally rated for outdoors when it has the yellow jacket on it. This was allowed many years ago, but they quickly found out that the sun just ate away at it and was causing dangerous situations. If it is going outside, a proper conduit is required.

Second, grounding/bonding is important. Years ago they allowed this too, and many plumbers still forget to properly ground/bond CSST. While it is an important step, the chances of something happening is very low. But all the same, grounding/bonding is not hard to do and should be carried out.

And lastly, keep it protected. It is not very tough, so getting banged around or hit all the time will weaken it and eventually case damage and leaks that require replacement of the tubing.


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