What are those things you see in the middle of nowhere (in the UK at least), a 10 foot high white pole with an orange roof-shaped lid on top? I gather they're to release excess gas from the mains and burn it off, but why would that be necessary? Surely they wouldn't put more than the correct pressure in anyway? Any excess could be released at the source at the gas plant? I've never known of one actually operate. I can't find a picture of one on Google as I don't know what they're called. Searching for pressure release just shows domestic valves.
- posted
5 years ago