Looking for a way to connect your low-flow sprinklers to sprinkler risers? The 1/2 in. FPT X 10-32 Threaded Outlet Sprinkler Riser Adapter threads onto the sprinkler riser & connects to a 10-32 threaded outlet on the other end. A filter washer inside the adapter ensures a watertight fit and screens out particles before they can clog the system. This adapter is made of acrylonitrile butadiene styrene (ABS) treated with UV inhibitors to prevent cracking.