The low cost of these drip emitters makes them very popular. The flows are rated at 15-20 PSI, so at lower pressure you will get a lower flow and at higher pressure you will get a somewhat higher flow. All of these drip emitters on this page are non pressure compensating. At very low pressure, these emitters work better than pressure compensating emitters. Watch our Basic Drip emitters installation video to see how easy they are to setup and use.