Watts 957N QT 3 Part of the 957 Series ADA Pad This first check valve kit This first check valve kit is used to repair or replace the first check on a 10 inch lead free double check detector assembly and used to prevent the reverse flow of polluted water from entering into the potable water supply not as an operating control 50 Minimum Temperature Fahrenheit 33 Outlet Connection Size 3 IN Outlet Connection Type Does Not Apply To Product Outlet Shutoff Valve Type Quarter Turn Ball Valve Outlet Thread Type Does Not Apply To Product Part Number 0111669 Polymer Coating No Pressure Operation Continuous Protection Type Backpressure and Backsiphonage Series 957 Strainer No Technologies Does Not Apply To Product Tradename None Specification Sheet 957 quarter turn ball valves