09/15/2021
Check out the full article entitled, "A Dry Fire Demonstration Reveals the Hidden Rust Threat"
https://www.corrview.com/technical-bulletin-fp-08
As we quickly learned, this extremely small volume of rust at approximately 1/4 cup and 2.26 oz. was more than enough to prevent the sprinkler head from functioning. The experiment was repeated multiple times with the same result.