Reader Interactions


  1. I never imagined that flexible gas hoses are illegal in some areas as they are often very convenient to use, especially when the two connections are not properly aligned. I guess safety is very important and it’s best not to compromise.

  2. Greetings,
    Not sure about the Great State of Illinois, Just seeing the picture its installed improper.
    I’m looking to figure out.. The flex in the picture is a appliance connector, csst would have different fittings.Can
    the fitting for the csst piping can be taken apart, but I’m trying to figure out, is it to be used to bleed the gas line ? and if so how many times can it be taken apart before the rings[if equipped] do not reseal. Its seems that this would not be a good practice , so if one would have hard pipe -valve then appliance connector ,I can see that no union would be needed.
    However with the csst [track piping]. if you where extending house lines to the appliance hard pipe -valve -csst then union?
    or is it not needed? Your opinion would be appreciated. Thanks jTracy

    • Hello again,

      The CSST TracPipe manufacturer allows up to 3 fitting re-attachments. You can find details on page 29 of this manual – under paragraph # 3. REASSEMBLY
      If the fitting is reattached more than three times, or if the nut cannot be pulled over the rings in any position, then the split-rings must be replaced.

      So the above answers your question about re-connecting / reusing the fitting. And the union… if you think that for some reason the pipe will have to be taken apart more than 3 times, convenient configuration would be: a shutoff valve at the manifold or heavy wall pipe end, followed by a nipple – union – nipple – CSST pipe – WH regulator. That way you can take it apart without touching CSST pipe fittings.
      Don’t forget that the TracPipe® gas piping material (CSSTCorrugated Stainless Steel Tubing ) must only be installed by a qualified person who has been trained or otherwise qualified through the TracPipe Gas Piping Installation Program.

  3. Looking at the 1st picture csst to valve -drip and control. how do you control the gas if you where to change out the control and or the water heater?? you could purge the gas line at the drip.., however i think the manufacture calls for a valve and union at that point. thanks

    • Hello Joseph,
      The gas shutoff valve from the 1st picture should be on the other side of that not permitted in IL flexible gas connector – between the heavy wall pipe and the flexible / not the flexible-valve-gas controller, assuming that CSST is used as a final WH connection, and that it is permitted in your area. The union is not required in such configuration because each end of the flexible connector allows for easy removal / separation of the gas line. However, your local building department and the manufacturer might have a different view, with the union, you’d have 3 movable parts to turn and block at the same time in order to separate them – two sections of the union connector and the flexible gas connector end.

      If you have small kids, it would be safer to extend heavy wall gas pipe slightly higher and make that flexible connection at the level difficult for them to reach… something to consider.

      Let me know if I can help you with anything else.

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