Backflow Reference Manual - Watts

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007 / 007M1 / 007M2 / 007M3 / LF007


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


This is a double check assembly. Production began in 1989. All versions in the 1/2"-2" size have bronze bodies with in-line modular check assemblies that are removed from a single cover on the top. In 2010 the LF model was introduced which utilizes a lead free bronze. Check modules are held in the body by a retainer. Check seats are replaceable. All springs are contained when the cover is removed. Spring tension had to be released for a proper repair. There have been several modifications over the years but all versions utilize a similar construction. Be sure which version you have because repair kits are different. The original design was the 007 model produced from 1989-1991. From 1991-1993 the 007M1 model was produced. The difference being in 3/4"-1" the disc holders on the newer M1 style are now plastic instead of bronze and in all sizes a change in the check seat dimensions. The check cover is bolted on in the 007 and the 007M1 except the 3/4"-1" 007 which had a screw on cover. The 007M2 design began in 1993. The major change in the 007M2 was the downsizing of the body which produced a corresponding downsizing change in the internal parts. In 1993 the 1/2" 007 began production. In 1998 the 3/4" 007M3 was introduced. The U007 series was developed in sizes 3/4"-2" which incorporates a union end into the body. The U007A series utilizes a 90 degree elbow for an up and down piping orientation. The 007PC series is a polymer coated bronze assembly. The SS007 series is available in sizes 1/2"-1". The SS007 is a stainless steel body assembly. In the 2 1/2"-6" the body is an epoxy coated cast iron design. The checks are an in-line design with a single bolted cover on the top. All springs are contained when the cover is removed. Spring tension has to be released for a proper repair. Check seats are replaceable. The 2 1/2"-3" check modules are held in the body with a retainer while the 4"-6" check modules are held in by a wire clip. The 4"-6" were discontinued in 1992. In 2010 a LF model was introduced in sizes 2 1/2"-3" which replaced the leaded bronze parts with plastic and stainless steel to make it a lead free assembly.


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.