Jain 12501255 90° Gray Aqua Spray Stick 3.0 GPH Flow Rate. An adjustable option on an emission device can be a good thing and a bad thing. While the adjustability may make applying large amounts of water easier, the uniformity of a system can get compromised. For such unique applications that do require the ability to apply different amounts of water to a plant, over its lifespan, the Jain Turbulent Flow Emitter exists. A self-piercing barb will assist in tool less installation