Toro Flood Bubbler Riser Full Circle with Adjustable Flow 53692 Go to amazon.com Related posts How to find the best flood risers for 2022? FeatureFor shrub, flowers, and/or treesFlow can be adjusted down from 0 to 2 GPM (gallons per minute)Installs onto a 1/2-Inch riserFor new or replacement installationsWorks with any other brand irrigation systems DescriptionFull Circle Flood Bubbler Riser, Adjustable Flow.