IFGC 403.11 Plastic pipe, joints, and fittings.

Basically says may be allowed it the longitudinal pull-out resistance equals the tubing; where compression joints, must be compatible with the tubing and the elastomeric seal must be compatible with the gas. This means you would have to identify the mfr., cross-reference this fitting with which type of copper (K,L or AC/R) and be lableled ASTM D-2513. There must be an internal stiffener which goes inside the tubing the length of the compression fitting and it cannot be split.

Also, it must be suitable for the class of service. Since this fitting is not parts of a listed system such as CSST, it cannot be located in concealed spaces.

Check out Permasert from Perfection Corp.

HTH

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