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The Watts 009 Backflow Preventer is a Reduced Pressure Principle Assembly. Production of the Watts 009 began in 1989. All versions of the Watts 009 in the 1/2"-2" sized are bronze bodies. The check modules and relief stem assembly of the Watts 009 can be removed through a single cover. The checks are modular, All seats are replaceable, and check springs are contained. There is spring tension on the cover from the relief valve spring. There have been several modifications over the years but all versions are similar in construction. Repair parts are different for each model. The Watts 009 was the original model that was produced from 1989-1991. It was modified in 1991 to the Watts 009 M1 model in sizes 1 1/4"-2" which was produced from 1991-1992. In the Watts 009 M1 model there was a change in the check seat dimensions. The Watts 009 M2 design began in 1992. The major difference in the  Watts 009 M2 design was the downsizing of the body and the internal repair parts. Internal checks are mostly plastic. The 1/2" model Watts 009 was introduced in 1992. The 3/4" 009M3 began in 1998. A model U009 was developed in sizes 1/2"-2". This unit incorporates a union end into the body. The U009A utilizes the same union with a 90 degree elbow for an up and down piping orientation. The model Watts 009 PC is a polymer coated bronze assembly available in sizes 3/4"-2". The model SS 009 is available in 1/4"-1" sizes and is similar to the Watts 009 except the body is made of stainless steel instead of bronze.

 

009 / LF009

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