This unit was installed on the 4" main line that feeds one of our stadium's field zones. It's basically a catalytic converter that removes calcium and other things from the water and allows for better water penetration, etc. I'm not concerned about its claims but one thing worries me. The contractor that installed it didn't call for a shut-down of the main line and his guys cut through the 4" line while it was still hot. Fortunately we were on site and were able to shut the isolation valve down that was only 10' away before it caused any permanent damage. Hopefully they did a good job of putting this together because this section of the main line is also on a booster pump that actuates via a flow sensor about 5' upstream.