Description
Watts 957 Series Reduced Pressure Zone Assemblies began production in 2000 under the Hunter name. In 2002, Watts bought the rights off of Hunter and is still manufacturing the devices. They are available in sizes 2 1/2 - 10" and are constructed of stainless steel. The 957 Series has become a top seller of Watts due to the light weight design and short lay lengths. It is also offered in a number of configurations with many valve options. To access the check assemblies there is a stainless steel sleeve that will slide open. On the 2 1/2 - 6" you must unthread the #3 test cock then slide the cover. 8 - 10" uses two Victaulic clamps to hold the stainless sleeve. The 957 uses two self contained cam checks that use a tri-link check mechanism. The relief valve is a piston / diaphragm style relief valve with an external sensing line hose. There are no special tools required for service.
