Not sure when it could have happened. 2 of the nipples were ok Todd but 5 were bad. The obstruction was like a tanish/brown color, like the color of one part of Hysol 9642, the dark color, and it was hard, I could not push it through with a pin that's why I had to drill it. I just wanted to let everyone know mostly to save Todd's time and their time of having to ship the units back thinking the solenoids were bad or something like that. I love the valve! Just one more thing to check when everyone is troubleshooting!

Chad, I think this happened post manufacturing as the blockage was not any kind of metal, it was something else. But that is just my guess.