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Backflow Reference Manual - Ames


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4001SS / 4001

Sizes

1/2", 3/4", 1", 1 1/4", 1 1/2", 3", 4", 6"

Description

This is a reduced pressure assembly. Production began in 2000 and was discontinued in 2003. In 1997 the Ames Company was purchased by Watts Regulator Company. Ames began marketing the Watts 995 as the Ames 4001SS. For repair information see the Watts model 995. The 1/2"-1 1/2" size is a copper body that is nickel plated. The ball valve shut-offs are integral to the valve body. The assembly uses an external relief valve sensing line. The checks are modular in construction and accessible from the top. The relief utilizes a plastic body and is mounted under the check body. The 3"-6" body is a fabricated body made from 300 series stainless steel tubing. The relief has an external relief valve sensing line. The checks are modular in construction and accessible from the single access cover on the top. The relief valve is accessible from the same cover. The relief valve stem assembly is located between the two checks under the cover. There were 2 versions of the relief valve stem produced. A visual inspection of the nut under the dust cap can determine which version you have. The older version must be converted to the new version to properly repair. The checks are modular and use a flat check disc that is field replaceable. In the 3"-6" sizes there is a 4001SSN and a 4001SSZ model. These are the same as the 4001SS except there is a 90 degree elbow mounted between the backflow preventer flange and gate valve flange to change the installation orientation of the assembly.

Details

Common repair parts are a very small subset of the 10,000 plus items BAVCO stocks. Please feel free to contact us direct at 800-458-3492 for pricing on items not listed or backflow prevention devices.