Yes they come in left and right hand threads. That is all I was stating. Not one end is left handed and the other end right hand threading.

You absolutely were stating that the union, which is really a coupling, was a right hand left hand union. I’ve put miles of this pipe in and had access to the factory catalog and I can tell you at the time there was no right hand left hand couplings.

The only problem is the brass CSST male adapter only come in right hand threads. The installer would have a hell of a time installing that in a right hand left hand malleable iron coupling.

The reason is every fitting is in itself a union. You can cut a tee or an elbow anywhere in CSST tube and put it together. It is not like threaded iron pipe where you start from the supply to the fixture and only use right hand threaded fittings and pipe.

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As I understand it, galvanic corrosion is not really an issue on indoor gas lines, as you do not have an electrolyte (water).

Correct me if I am wrong but, I see CounterStrike® tubing by OmegaFlex. This CSST flex pipe is up to 400 times more resistant to the damaging effects of electrical energy than yellow CSST.

OK , so I have a question for all you inspectors out there. I called this out as an incorrect coupling as there is a correct one available. The homeowner had a plumber inspect and they stated that this is “typical” and that it passed the original inspection, and that there is nothing wrong. What do you all think?? Gas line Coupling1860×1395 290 KB

Proper pipe Bonding may be affected. 1: Dielectric fitting is required. Dissimilar metals. If there is no dielectric fitting galvanic corrosion can precede. Hope I am making sense.

It appears to be a normal approved malleable iron coupling. What makes you think it’s a right hand left hand thread coupling?

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Iron not Brass. Because they come in right of left hand threading and used on nipples or other threaded rigid or flexible pipes.

There will not be. CSST tubing can have iron pipe in the same system with no issues. Even the manufactures manifold is made of malleable iron.

It appears to be a normal approved malleable iron coupling. What makes you think it’s a right hand left hand thread coupling?

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As I understand it, galvanic corrosion is not really an issue on indoor gas lines, as you do not have an electrolyte (water).

The union does not appear to be manufactured from Brass, an alloy of copper & zinc, for durability, corrosion resistance, and high electrical conductivity. It is a BIS rigid pipe nipple left/right hand threaded couple, manufactured from galvanized steel or cast iron, which may affect durability, corrosion resistance, and high electrical conductivity. If this is the case; a: there will be galvanic corrosion due to dissimilar metals unless joint faces are insulated with non-conducting gaskets & grommet-type fasteners. Even then the CounterStrike® manufacture might prohibit such use.

Yes they come in left and right hand threads. That is all I was stating. Not one end is left handed and the other end right hand threading.

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