The Watts LF757NDCDA is a double check detector assembly (DCDA). It is available in 2 1/2″-10″ sizes and has been in production since 2014. The body is made of stainless steel. The LF757NDCDA utilizes a 3/4″ LF007M2 for the bypass assembly. The LF757NDCDA is a Watts private label of the Ames LFC300N.