Appreciation post: a $12 tube of pipe dope fixed a leak two plumbers in Denver walked away from
The 3 inch line on a restaurant grease trap kept sweating at a threaded joint in the basement, and after two pros shrugged and quoted a full repipe, I swapped in a fresh tube of RectorSeal and snugged it down, and the joint has stayed bone dry for 6 weeks now, so I'm curious what other small fixes have bailed you out of a big quote.