Dial in the right amount of water you need with the Dial-a-Flo™ Adjustable Bubbler. Turn the bubbler head which works as a dial to change the discharge rate from 0 to 20 GPH and the spray range from 0 to 5 in. radius. Bubbler releases water in an umbrella spray pattern. To install, insert the 1/4 in. barbed inlet into 1/4 in. distribution tubing (A220 and A250) or 1/4 in. Dura Flo™ JR dripline and attach to a stake, or insert bubbler directly into hole-punched supply tubing. Ideal for watering trees, shrubs, flower beds, groundcover, vegetable gardens, plants in pots, planter boxes, and hanging baskets. The adjustable bubbler is made of polyethylene treated with UV inhibitors to prevent fading and cracking.