Windscreen Washer Valve No-Return (T-Valve) Non Return Inline T Piece Valve - One way Product Features: Centre is the input and both sides output Will fit tubes 5mm and 6mm Design to stop the back flow of air and water passing back down the pipes or tubes. Made of high-quality materials, very durable Easy to install and operate MORE ONE WAY VALVES FAST DISPATCH FREE UK SHIPPING.