0794007 (Watts) | 2-1/2 - 3 Inch | 007Lead Free Dcda First Check KitThis First Check Replacement Kit is Used to Repair or Replace The First Check on a 2 1 2 to 3 Inch Lead Free 007 Double Check Detector Assembly to Prevent The Backflow of Contaminated Water Into The Potable Water Supply. It Consists of a Seat, Seat O Ring, Disc Assembly, Spring, Check Cage And Cover O Ring. It is Ideal at Referenced Cross Connections Identified as Non Health Hazard Applications. Watts 0794007