Express End Flush Valve High Flow John Deere OEM S.S. Plumbing or 17mm port sizeRetrofit to replace plug in express end cap with robust ball valve with 1 2" PTC port for easy cleaning and maintenance. 1 2" PTC Stem elbow is available to keep rinsate off of the boom Express End Cap with flush valve benefits Eliminates trapped air from the boom by allowing air to escape through the nozzle body, reducing nozzle turn off time by 85% Eliminates dead ends of pipe where chemical residue can build up Easy to use valve provides a cleanout