Mixing chemical openers with bleach or ammonia releases toxic chlorine gas—a real ER visit trigger.
He knelt, the knees of his overalls squelching. He unhooked the grate, lifting it away with a squeal of rusted metal. The hole beneath was black, an abyss that smelled of rot and regret. emergency drain unblocker
"1920s, I think. Why?"
If your toilet, shower, and sink are all backing up at once, the issue is likely in your main sewer line. Mixing chemical openers with bleach or ammonia releases