DIG's Earthline Brown 1 GPH PC drip-line is a pressure compensating drip line with drip emitters every 18 in. delivering equal flow over the length of drip line. Use for all plantings, including groundcover, shrubs or individual plants, loop around trees or for complete coverage of an area where multiple lines of drip line are placed 16 in. to 24 in. apart. Each PC drip emitter inside the drip line consists of a cylinder with a labyrinthine water passage, filter and diaphragm. Each PC drip emitter continuously adjusts to varying incoming water pressure, ensuring a constant flow rate along the line. Color: Browns / Tans.