The Ames C200 and Ames C300 are double check valve assemblies. Originally produced under the Hunter name from 2000-2002. In 2002 Watts bought the Hunter models and began producing them as the Ames C200 and C200A. Watts also produces these models under the Watts name as the model 757 or 757A. The "C" designation refers to Ames Colt brand name. The body is stainless steel tubing. To access the check components a sleeve is mounted over the access cover. On the 2 1/2"-6" sizes the sleeve slides over the body to access the check components. On the 8"-10" sizes the sleeve is attached by two grooved couplings. The checks are modular and constructed of Noryl plastic. The check utilizes a torsion spring which is contained when the check module is removed from the body. The check spring must be extended and controlled with a pin or screw driver to replace the check disc. The check disc is either an EPDM or silicone. The model Ames C200 and Ames C200A will have the same external dimensions. The "A" model was discontinued in 2008 and utilizes a bi-link check mechanism while the "non A" version utilizes a tri-link check mechanism. The body length may vary and could be 1" shorter than shown in the dimension chart on versions produced earlier than 2003.
C200 / C200N
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