VORTEX 3001 EMITTER BY SPOT SYSTEMS. AVAILABLE IN BLACK 1 GPH(gallons per hour), OR GREEN 2 GPH. FITS 1/8 INCH DRIP TUBE. A pressure compensating emitter without springs, diaphragms, moving parts, or flow passage constriction. Flow control (and pressure compensation) is accomplished by causing water to spin at high speed inside the emitter. Centrifugal force created by the spinning water results in a low pressure at the center of the vortex chamber where the emitter is located. 1/8 inch barb. Sold by each |