Fragola offers these economical pressure testers for your AN hose assemblies. These individual line testers allow you to use a compressed air source and a water bath to check for leaks in your hose assemblies prior to installation. Includes two line plugs, one blank and one fitted, and a valve stem that allows you to pressurize the hose. Once pressurized simply submerge in a bucket of water and observe for air bubbles escaping from the AN hose assembly. If you do not see any your hose is fit for service!