All Toro® landscape dripline uses a large double-outlet cylindrical emitter, which is much more tolerant of debris compared to theother market leaders, most of whom use a compact single-outlet emitter. While filtration is always recommended for any drip irrigationinstallation, filters only protect the incoming water from the valve connection. In the event of a damaged line at any point from the filteron down, or any other possible point of entry into the system for debris, Toro outperforms the competition and consistently keeps on flowing.