The Ames 3000BM1 is a double check detector assembly (DCDA). It is available in a 2″ size and has been in production since 2011. The body is made of bronze. The 3000BM1 utilizes a 1/2″ 2000B for the bypass assembly. The 3000BM1 is an Ames private label of the Watts 007M1DCDA.