Originally Posted by Kiril
Matched PR means nothing here. DU is what you are looking for, and you will never get 100% DU in a sprinkler system .... EVER! Also, people that think that you can run fertilizer through your sprinkler system without having to perform maintenance to remove biological buildup are wrong.
What is DU? I would be willing to bet that he does not have MPR. Before I became a factory authorized installer I talked to dozens of contractors that have installed the EZ Flo. Once they switched to liquid they had no more problems.