The Watts 007M1 is a double check detector bypass device. Production started in 1991. It is available in 3/4″ size only. The body is made of bronze. This device comes with no shutoff valves. It is used as the bypass on many Ames and Watts devices including the 6″ 3000SS, 8″ 3000SE, 4″ and 6″ 709DA, 6″ 774DCDA, and the 8″ 774XDCDA.