The Truma Ultraflow Flexi Non-Return Valve is designed for use in caravan and motorhome water systems. It’s designed to allow water to flow in one direction only, preventing backflow that could potentially contaminate the clean water supply. This valve is specifically designed for flexible pipework and features 10mm barbed pipe ends for secure attachment. Use with Truma's Ultraflow system, for seamless integration. The valve measures approximately 90mm in length, with the main body being 40mm. Fitted correctly it will prevent contamination in the water system.