Watts 757 Series is a double check assembly. This model was manufactured under the Hunter name from 2000-2002. In 2002 Watts bought the Hunter models and began production as the Watts models 757 and 757A. These are also sold under the Ames name as models C200 and C200A. The body is stainless steel tubing. To access the checks, a movable 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 check components are modular made of of Noryl plastic. The checks utilize 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 screwdriver to replace the check disc. The check disc may be either an EPDM or silicone. The "A" designation refers to a bi-link check mechanism while the "non A" version utilizes a tri-link check mechanism. The body length can be up to 1" shorter than shown in the dimension chart on versions produced before 2003.
757 / 757N
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