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  • 007 / LF007

    007 / LF007

    Watts 007 Double Check Backflow Preventer

    The Watts 007 is a double check valve 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. Check modules are held in the body by a retainer. Check seats are replaceable. All springs are contained when the cover is removed. There have been several modifications. 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 are 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 also downsized 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.

  • SS007

    SS007

    Watts 007 is a double check valve 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. Check modules are held in the body by a retainer. Check seats are replaceable. All springs are contained when the cover is removed. There have been several modifications. 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 are 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 also downsized 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 has a stainless steel body assembly.


  • 719 / LF719

    719 / LF719

    Watts 719 is a double check assembly. Production began in 2003. This has a poppet style check. Check covers unscrew from the top of the body. The springs are not contained. The body is made from a bronze alloy. The R10 and R15 designation refers to models that used one size body to fit several smaller sizes by assembling smaller ball valves on the ends.

  • 709

    709

    Watts 709 is a double check assembly. The 3/4"-2" were discontinued in 1993. The 3/4"-3" size body is constructed of bronze. In the 3/4"-2" sizes the internal hardware parts are made of plastic and bronze. Watts manufactured a hot water version available on the 3/4"-2" sizes. This was designated by an HW after the model. Internal hardware parts are made of bronze and stainless steel. Check seats are replaceable on all sizes.

    This series is currently Obsolete!

     

  • 709 LBF / LF709 LBF

    709 LBF / LF709 LBF

    Watts 709 is a double check assembly. The 3/4"-2" were discontinued in 1993. The 2 1/2"-10" sizes began production in 1979. The 3/4"-3" size body is constructed of bronze. In the 3/4"-2" sizes the internal hardware parts are made of plastic and bronze. Watts manufactured a hot water version available on the 3/4"-2" sizes. This was designated by an HW after the model. The 2 1/2"-10" size bodies are cast iron with a fused epoxy coating. The 2 1/2"-3" size are available in either bronze or fused epoxy coated cast iron. Internal hardware parts are made of bronze and stainless steel. Check seats are replaceable on all sizes. Double check detector assembly. Production began in 1979. The assembly utilizes the 709 design on the main valve and the bypass unit. In 1991 the bypass was changed to the 007M1 model. In 1993 the bypass was changed to the model 007M2. In 1998 the bypass was changed to the 1/2" 007.

  • 757 / 757N

    757 / 757N

    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.

  • 774

    774

    Watts 774 Series is a double check assembly. In 1997 the Watts Company purchased the Ames Company. Watts began marketing the Ames 2000SS as the Watts 774 and the 2000SE as the 774X. The body is stainless steel. The model has a modular check design so that springs will be contained when the cover is removed. The check mechanism threads into the body and is a cam operated design made of glass filled Noryl. In the 2 1/2"-6" size the check assemblies are not field repairable and the whole check module must be replaced for repair. The difference between the 774 and 774X is the 774X has parts one size smaller than the pipe size. The 8"-10" check does have a rubber disc that is field replaceable.

  • 770 / 772

    770 / 772

    Watts 770 is a double check assembly. Discontinued in 1997. The check bodies are made of ductile iron which is fused epoxy coated. The check has a stainless steel toggle linkage. The check springs are contained. The spring tension must be released to repair the assembly. The bronze check seats are replaceable. A seat removal tool is needed. Vulcanized clapper plates are used to seal the check. The shutoffs on the 772 are a special shutoff. The shutoffs used on the 772 are not standard. There are two different size flanges on the inlet and outlet.

    This series is currently Obsolete!

     

  • 773

    773

    Watts 773 is a double check assembly. Manufactured only from 1998 - 1999. The internal parts are similar to the Model 709. The body was changed to provide a vertical installation capability. The body is a fused epoxy coated cast iron body. Check springs are contained. The check seats are replaceable.

    This series is currently Obsolete!

     

  • 775

    775

    Watts 775 is a double check assembly. Production began in 1998. The 3"-6" were discontinued in 2003. In the 1/2"-2" size the body is made of nickel plated copper. There is a single cover. The checks are modular. The check modules thread into the body. The 3"-8" body is made of stainless steel. The checks are modular The check modules are repairable and thread into the body. In the 3"-8" size there is a 775N model which uses two stainless steel elbows mounted between the backflow preventer flange and shutoff flange.

    This model is currenlty obsolete! No parts remain, please call for availability on replacement device:

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