>>3012302

"CE" isn't an agency.

That said, you are right that UL isn't the only entity recognized in the US. The generic term is "Nationally Recognized Testing laboratory" or NRTL. UL is a NRTL. So is Factory Mutual (FM).

I doubt these meters lack NRTL approval. Somebody give meter details, maker and model, otherwise I call BS on the claim "no UL (or equiv) mark"

>>3012415

Could be a distribution system pressure regulating valve allowing high pressure to be delivered to consumer, and consumer's gas train can't handle the pressure.