PCB and AFB Bubbler Nozzles PCB and AFB Bubblers 1/2" Thread
A whole new generation in bubbler technology offers all the precision of drip, but none of the maintenance hassles.

Four different PCB models means that you can choose from color-coded flow rates of either .25, .50, 1.0, or 2.0 gallons per minute to eliminate guesswork and guarantee that all your greenery gets exactly the water it needs. Or choose the AFB model which pressure compensates to a 2.0 GPM flow and can be fine-tuned with a stainless steel screw adjustment.