Real talk about drainage: why testing multiple faucets will save you time, money, and headaches

https://cleaneverycorner.com/slow-draining-showers-diagnose-main-line-vs-individual-drain-problems-and-finally-silence-the-gurgles/

3 key factors to consider when you’re trying to figure out a drainage problem When a sink or shower is slow, people jump straight to plungers and snakes. That’s fine sometimes, but what really matters is figuring out where the problem lives