Porcelain is ceramic. When you rapidly heat one part of it (the inside of the bowl) while the outside remains cold, the material expands unevenly. This is called thermal shock. In my case, a hairline crack spiderwebbed from the drain hole up the side of the bowl. Congratulations—you now don’t have a clog; you have a leak.
Remove as much water from the bowl as you can. Add one cup of baking soda, followed by two cups of white vinegar (heated, but not boiling). The fizzing action scrubs the pipes chemically without heat stress. Flush with warm water after 30 minutes. boiling water in toilet
I tried the "boiling water in toilet" trick so you don’t have to. Here is the good, the bad, and the cracked porcelain. The Myth: Boiling water dissolves the clog and sanitizes the bowl instantly. The Reality: Modern toilets are not industrial drainage pipes. They are delicate, glazed ceramics designed to hold room-temperature water. What Actually Happens When You Pour Boiling Water? I poured a half-gallon of nearly boiling water directly into the bowl. For the first three seconds, nothing happened. Then came the sound: Creeeeak… pop. Porcelain is ceramic
Squirt a generous amount of dish soap (half a cup) into the bowl. Let it sit for 20 minutes. The soap sinks and lubricates the pipe. Then, pour a bucket of warm (not boiling) water from waist height. The pressure and lubrication often break the clog instantly. In my case, a hairline crack spiderwebbed from
Save the boiling water for your pasta. Save the toilet for your... well, you know.
Title: Don’t Do It Until You Read This: The Boiling Water Toilet Trick