The T&S Brass 018232-45 Check Valve Adapter Assembly is the perfect accessory to keep the EC-3122 series electronic faucet in great working condition. The flex hose that came with the EC-3122 electronic faucet package swaps out with this accessory, allowing quick and easy maintenance or replacement for a worn flex hose. This T&S Brass 018232-45 Check Valve Adapter Assembly features a braided stainless steel flexible hose that connects to the bottom of your faucet ensuring a reliable water supply at all times. The hose has a check valve adapter assembly with a 3/8 inch compression swivel inlet. It comes with a rigid end with 2 O-rings for easy installation. More details are available in the website. The T&S Brass 018232-45 Check Valve Adapter Assembly is an ADA-compliant product and is recognized for meeting the required environmental standards. T&S is among the first commercial plumbing manufacturers and has set the quality standard in the industry for almost 50 years.