The 3" Watts 007 DCDA double check detector assembly began production in 1995 and is still currently being produced. The 007 is an inline check design with a single access cover. The body is epoxy coated cast iron construction. Fully testable. Several different bypass assemblies have been used. Many common bypass assemblies use 3/4" 007M1, 3/4" 007M2, or 1/2" 007. Many valve options are available, flanged ball valves and flanged gate valves.