The Ames M200 and Ames M300 are double check valve assemblies. This model was produced under the Hunter name from 2000-2002. In 2002 Watts bought the Hunter models and began producing them as the Ames M200 and M200A. The "M" designation refers to Ames Maxim brand name. The body is stainless steel tubing. To access the check components a sleeve is mounted over the access cover. On the 6"-10" sizes the sleeve is attached by two grooved couplings. The checks are modular and constructed of Noryl plastic. The check HAS 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 is either an EPDM or silicone. The "A" model was discontinued in 2008 and has a bi-link check mechanism while the "non-A" version utilizes a tri-link check mechanism. The body length dimensions may 1" shorter than shown in the dimension chart on versions produced in 2003 or earlier.
M300 / M300N
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