MYTH: Your leak is due to fire sprinkler water corrosion. The dissolved oxygen in sprinkler water contributes significantly to corrosion in wet pipe fire sprinkler systems.
FACT: Sprinkler systems are filled with source water that contains 10 ppm of dissolved oxygen (that’s 0.001% of water volume). Almost all of the oxygen available for corrosion in sprinkler systems is present in trapped gas pockets (99.975%). In other words, there is 4,000 times more oxygen available in the trapped gas than the water.
Download ECS Wet Pipe Nitrogen Inerting (WPNI) Brochure
When oxygen in the trapped air reacts with steel pipe in a typical 1,000 gallon wet pipe sprinkler system it produces 5.8 lbs of iron oxide (corrosion by-product), while dissolved oxygen in the water produces only 0.002 lbs of iron oxide. This localized corrosion near trapped air results in rapid metal loss that causes leaks. With the repeated introduction of new oxygen every time a system is drained and filled significant amounts of iron oxide collects throughout the piping network and leads to obstructions or system impairment. This excessive accumulation of corrosion by-product is not caused by dissolved oxygen in the water.
Removing dissolved oxygen from sprinkler water adds cost, time, and complexity for NO benefit. TREATING THE WATER IS COMPLETELY UNNECESSARY. REMOVE TRAPPED OXYGEN TO ELIMINATE CORROSION!
The ECS Approach: Wet Pipe Nitrogen Inerting (WPNI)