The Ames 3000B is a double check detector assembly (DCDA). It is available in a 2″ size and was produced from 1998-2013. In 2011 Ames introduced the 3000BM1 which incorporated changes in the body and bypass piping. The body is made of bronze. The 3000B has used multiple devices for the bypass assembly. It currently utilizes a 1/2″ 2000B for the bypass assembly. The 3000B was an Ames private label of the Watts 007DCDA.