The Wilkins 350ASTDA is a double check detector assembly ( DCDA ). It is available in 2 ½” – 10” sizes and has been in production since 2011. The body is made of stainless steel. The 350ASTDA utilizes a 3/4″ 950XLD as its bypass assembly. Parts are not interchangeable between the 350ASTDA and 350ADA.
American Backflow Products Company