Has all of the internal filters that the potable water ones have. Even though there is a filter on the irrigation water, small matter still passes through. Small enough to exit the sprayer port but large enough to clog the internal filters. I generally remove them prior to installation
My old sprayer heads drove me nuts! These sprayer heads work great, cast a wide pattern, and are easy to clean. YouTube videos walk you through the cleaning process and there's a tool to remove the head for cleaning that doesn't require you to dig it up every time.