On Sunday, January 24, 2021 at 6:36:33 PM UTC-5, Bob F wrote:
On 1/24/ what looks like a fifth swi it.

Does that pipe go to the burner control gas valve (with the pilot button
on it probably)?

Yes, it does. So we're getting somewhere.

How big is "tiny"?

3/4" long, 1/2" high.