Check the listing for details. UFB OPTIFILL 2 - 4 OZ/SEC VALVE COMPLETE #561000165. Condition: New. Listed at 538.95 USD. Gregoriou Brothers Refrigeration Since 1979Frosty-Freeze UFB OPTIFILL 2 - 4 OZ/SEC VALVE COMPLETE #561000165 UFB OPTIFILL 2 - 4 OZ/SEC VALVE COMPLETE UF-1/UFB Electric Post-Mix Valves are a highly reliable, low maintenance group of valves. The product is modular in construction and allows the user to replace or change major assemblies without tools. Models available include basic Sanitary Lever, Portion Control, Self-Serve, and Optifill (automatic shut off electronic versions). UFB OPTIFILL 2 - 4 OZ/SEC VALVE COMPLETE UF-1/UFB Electric Post-Mix Valves are a highly reliable, low maintenance group of valves. The product is modular in construction and allows the user to replace or change major assemblies without tools. Models available include basic Sanitary Lever, Portion Control, Self-Serve, and Optifill (automatic shut off electronic versions).