957(N or Z)
The Watts 957N and 957Z are reduced pressure assemblies (RPA). They are available in 2 1/2″-10″ sizes and have been in production since 2000. Their bodies are made of stainless steel. The 957N is an “N” shaped device and the 957Z is a “Z” shaped device but they share the same parts. The Watts and 957Z are Watts private labels of the Ames C400N and C400Z.