EE WAS ATTEMPTING TO CLEAR SALTED UP LINE. HE ATTACHED HOT WATER TO A CLEAN OUT VALVE THEN WENT TO ANOTHER VALVE, OPENING IT, TO DETERMINE WHERE LINE WAS PLUGGED. NOTHING CAME OUT SO EE STEPPE D IN FRONT OF VALVE TO GET ROD, & PLUG IN LINE CAME LOOSE SPRAYING HIM WITH HOT WATER & CAUSTIC SOLUTION.