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hippy in reply to @moocher

Since forever*

https://en.wikipedia.org/wiki/Dunlop_valve

*not actually forever

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gbj_tester in reply to @hippy

Since forever*

Since the 1890s. Woods, Schrader and Sclaverand all date from that period.

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hippy in reply to @gbj_tester

The reason I linked to that wiki page is I wanted to find out when it was invented.
It didn't have that info and I lost interest. You should update the wiki page and bask in eternal valvey glory.

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