QMP (QMP804AG) Faucet Arc Spout Air Gap Chrome w- Chrome Tip and Chrome HandleQMP 800 Series Air Gap Faucet QMP804AG Faucet Arc Spout Air Gap Chrome w Chrome Tip and Chrome Handle Premium ceramic disc air gap faucet designed to prevent backflow contamination in under sink reverse osmosis installations Ceramic Disc Technology Air Gap Protection QMP USA WHY IT WORKS Engineered for safety and performance in RO systems Air Gap Siphon Break Physical separation prevents drain water from flowing backward into your RO unit or filtered