This is a double check assembly. Production began in 1990. The body is constructed of fabricated stainless steel. There is a single top mounted cover for access to internal parts. All versions utilize a modular check design. It is modular so that the springs are contained and seats are replaceable. The 2 1/2"-12" check mechanism is made of a glass filled noryl. The checks are modular in construction so that springs will be contained and seats are replaceable. The check design is a cam operated mechanism. In the 2 1/2"-6" sizes the check modules are not field repairable and the whole check module must be replaced for a proper repair. The 8"-10" check does have a rubber disc that is field replaceable. There is a 2000 SE design in the 2 1/2", 6", & 8" Sizes. The differences between the SS and SE model is that the SE utilizes internal parts one size smaller than the pipe size: (e.g. a 8" 2000 SE would contain 6" check modules, a 6" 2000 SE would contain 4" check modules). Be sure which version you have because parts will be different. The 2 1/2" SE was discontinued in 2003. The 6" and 8" SE models were discontinued in 2006.

6 Inch First Check Kit, Series 2000SS/3000SS. This is an original manufacturer repair product used within various divisions of the Watts Water Technology Company� (Ames, Febco, Watts)