By any chance did you look to see if the valve is intact and working?
Might be moving but it's rotted away?
Old Navy term KISS.
Take no offence to the below. It's just how I think.
"K.I.S.S." redirects here. For other uses, see
Kiss (disambiguation).
KISS, an
acronym for "
Keep it simple, stupid!", is a
design principle first noted by the
U.S. Navy in 1960.
[1][2] First seen partly in
American English by at least 1938, KISS implies that
simplicity should be a design goal. The phrase has been associated with aircraft engineer
Kelly Johnson.
[3] The term "KISS principle" was in popular use by 1970.
[4] Variations on the phrase (usually as some
euphemism for the more churlish "stupid") include "keep it super simple", "keep it simple, silly", "keep it short and simple", "keep it short and sweet", "keep it simple and straightforward",
[5] "keep it small and simple", "keep it simple, soldier",
[6] "keep it simple, sailor", "keep it simple, sweetie",
[7] "keep it stupidly simple", or "keep it sweet and simple".