#1 Check Assembly Repair Kit for 6" 350/350DA/450/450DA SKU: RK6-350CK1 $852.00 Login for better price Select Quantity -+ Add to Cart Additional DetailsResourcesManufacturer: Wilkins Size: 6 Inch Product model: 350, 350A, 350ADA, 350DA, 450, 450DA Installation and Maintenance Instructions 2 1/2" - 6" Specification Sheet Repair Parts Guide Zurn Wilkins Backflow Prevention 350 (4 inch & 6 inch) - How to Repair Zurn Wilkins Backflow Prevention Model 49 Butterfly Valve - How to Adjust Opening and Closing Stop