Watts 774 Series is a double check assembly. In 1997 the Watts Company purchased the Ames Company. Watts began marketing the Ames 2000SS as the Watts 774 and the 2000SE as the 774X. The body is stainless steel. The model has a modular check design so that springs will be contained when the cover is removed. The check mechanism threads into the body and is a cam operated design made of glass filled Noryl. In the 2 1/2"-6" size the check assemblies are not field repairable and the whole check module must be replaced for repair. The difference between the 774 and 774X is the 774X has parts one size smaller than the pipe size. The 8"-10" check does have a rubber disc that is field replaceable.
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