Universal Water Return Valve. The Universal Car Water Return Valve, MTR2256-2, is designed to support optimal performance in engine cooling systems. This product protects your vehicle's engine from overheating, increases fuel efficiency, and extends engine life. Its universal design makes it suitable for many different vehicle models. The robust construction of the water return valve ensures long-lasting and reliable use. Its easy installation saves time and eliminates additional installation costs. The Universal Car Water Return Valve maintains optimal performance by ensuring the efficient operation of your engine's cooling system.