noun a valve for preventing flowing liquid, as sewage, from reversing its direction.
backflow valve 🔊 Listen to this noun a valve for preventing flowing liquid, as sewage, from reversing its direction. Zurn-Wilkins 2 in. Lead-Free Reduced Pressure Principle Assembly Backwater Valves | How They Work, Costs, Repairs and More | Square One Zurn 3/4 in. Brass FIP x FIP Pressure Vacuum Breaker Backflow Zurn-Wilkins 2 in. Lead-Free Double Check Valve Assembly-2-350XL Share Facebook Twitter Google +