

Depends on what kind of sprinkler system and how old it is. Some of them are closed systems and the water stays stagnant until it’s set off, so when it finally goes the water itself is a hazard because it’s been sitting potentially for years. It tends to come out very disgusting, black sludge that smells like actual shit. And then you have a whole specialized response and cleanup required because it’s loaded with bacteria.
They won’t clean it though, they’ll piss away more money to hire specialized cleaners and contractors to fix the damage


https://m.youtube.com/watch?v=-0Sky1AyDzM