In what country?
I have never seen a device like you're describing on any gas-operated stove in the US, UK, or Singapore.
July 14, 2020 at 09:11AM
via reddit https://www.reddit.com/r/explainlikeimfive/comments/hqzy1c/eli5_why_do_you_usually_have_to_hold_down_the_gas/fy176pc?utm_source=ifttt