Why Your New Home's Pipes Gurgle: Real Answers from Someone Who's Been There

https://telegra.ph/How-Testing-Multiple-Faucets-Pinpoints-Low-Water-Pressure-Problems-So-You-Stop-Guessing-01-31

1) Why a gurgling drain usually means trapped air or a venting problem When a sink or toilet gurgles, it's not spooky plumbing spirit work - it's air moving through water in the trap