0889371 (Watts) | 2-1/2 - 4 Inch | 957/957RPDA/LF957RPDA Second Check Repair Kit | Red Silicone DiscThis 2 1 2 to 4 Inch Check Assembly Red Silicone Disc Kit Includes The Parts Necessary to Repair or Replace The Second Check of Series 957, Reduced Pressure Zone Assembly, or Reduced Pressure Detector Assembly, Series 957RPDA This Kit Consists of All Parts Necessary to Repair The Second Check Assembly of The Applicable Valve. All Parts Are Genuine And Original to The Valve. Watts 0889371