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Backflow Assemblies

Backflow Assemblies

Wilkins Backflow Assemblies include AST Series, 975XL2, 720A etc.

  • 40XL2

    40XL2

    Designed for installation on domestic and commercial water systems such as well pump systems and applications requiring tight seating. For use as a positive backstop to eliminate reduced pressure principle backflow preventer discharge caused by pressure fluctuations or water hammer.

     

  • 700XL

    700XL

    Designed for installation on water lines to protect against both backsiphonage and backpressure of polluted water into the potable water supply. The Model 700 shall provide protection where a potential health hazard does not exist.

     

  • 705

    705

    Ideal for use where Lead-Free* valves are required. Designed for installation on potable water lines to protect against both backsiphonage and back pressure of polluted water into the potable water supply. The Model 705 shall provide protection where a potential health hazard doesn ot exist. Applications include indoor and outdoor meter box installations as primary domestic water protection. Standard lay length allows for retrofit of existing dual checks. Lead-free body and checks ensure safe drinking water while providing maximum corrosion resistance.

     

  • 735

    735

    Designed for installation on laboratory faucets, where a potential health hazard exists due to back siphonage of contaminated water from the sink or other apparatus.

     

  • 740

    740

    Dual Check Valve with Vent designed for installation on carbonated beverage dispensing systems, as well as noncarbonated systems, to prevent Carbon dioxide (CO ) gas or carbonated water from coming in contact with copper potable water supply line.

     

  • 760

    760

    Designed for installation on boiler fill water lines to protect against both backsiphonage and backpressure of polluted water into the potable water supply. Assembly shall provide protection where a potential health hazard does not exist.

     

  • 876CI

    876CI

    Wilkins 876CI is the Wilkins model 760 and 80BR & 80CI combined. It is of all bronze construction and is designed as a boiler fill valve.

     

  • 310

    310

    Designed for installation on water lines in fire protection systems to protect against both backsiphonage and backpressure of polluted water into the potable water supply. Assembly shall provide protection where a potential health hazard does not exist.

     

  • 350XL

    350XL

    Wilkins 350 composite body backflow assembly is designed for installation on potable water lines to protect against both backsiphonage and backpressure of contaminated water into the potable water supply. Assembly shall provide protection where a potential health hazard exists.

     

  • 950XLT2

    950XLT2

    Wilkins 950XLT2 Designed for installation on potable water lines to protect against both backsiphonage and backpressure of polluted water into the potable water supply. A test cock plug is provided to protect against fouling caused by insects, dirt and debris. Assembly shall provide protection where a potential non-health hazard exists.

     

  • 350A

    350A

    The Wilkins 350A and 350ADA are double check assemblies. Production of the 2 1/2"-10" began in 1998. he 2 1/2"-12" body is made of epoxy coated ductile iron. The check springs are contained. The checks are a glass filled Noryl. Modular checks are contained in the body by clips. The spring tension is contained when the checks are removed from the body. Do not relieve spring tension when changing the check discs. The model 350 is a straight horizontal piping orientation. The model 450 is able to be changed to provide an up and down or vertical piping orientation. Repair parts will be the same in both models. In 2004 the 350 became available in an "A" model. The A model uses a grooved end valve body configuration as opposed to a flanged end valve body.

     

  • 350AST

    350AST

    Wilkins 350AST Designed for installation on water lines in fire protection systems or potable water lines to protect against both backsiphonage and backpressure of polluted water into the potable water supply. Model 350ASTDA shall provide protection where a potential health hazard does not exist. Ideal for use where Lead Free* valves are required.

     

  • 450

    450

    Wilkins 450 and 450DA are double check assemblies. Production of the 3/4"-2" began in 2004. The 3/4"-2" use a bronze housing which holds a glass field Noryl body containing the check mechanism. The checks are inline modular design. Spring tension is contained when the checks are removed from the body. Production of the 2 1/2"-10" began in 1998. The 12" began in 2007. The 2 1/2"-12" body is made of epoxy coated ductile iron. The check springs are contained. The checks are a glass filled Noryl. Modular checks are contained in the body by clips. The spring tension is contained when the checks are removed from the body. Do not relieve spring tension when changing the check discs. The model 350 is a straight horizontal piping orientation. The model Wilkins 450 is able to be changed to provide an up and down or vertical piping orientation. Repair parts will be the same in both models. In 2004 the 350 became available in an "A" model. The A model uses a grooved end valve body configuration as opposed to a flanged end valve body.

     

  • 950XLTDA

    950XLTDA

    Designed for installation on water lines to protect against both backsiphonage and backpressure of polluted water into the potable water supply. A test cock plug is provided to protect against fouling caused by insects, dirt and debris. Assembly shall provide protection where a potential non-health hazard exists. Body is made from bronze, and carries a UL/FM, ASSE 1048 approval for horizontal and vertical installation. Equipped with OSY shut off valves, and metered with a 3/4" 350 double check assembly.

  • 950XLTDABF

    950XLTDABF

    Designed for installation on potable water connections in fire sprinkler systems to protect against both backsiphonage and backpressure of polluted water into the potable water supply. Model 950XLTDABF shall provide protection where a potential health hazard does not exist. Incorporates metered by-pass to detect leaks and unauthorized water use. The main body is cast from bronze, and carries a UL/FM and ASSE 1048 approval for horizontal & vertical installation. The bypass is a 3/4" 350, and the main unit has butterfly valve monitoring switches.

  • 350ADA

    350ADA

    The Wilkins 350A and 350ADA are double check assemblies. Production of the 3/4"-2" began in 2004. The 3/4"-2" use a bronze housing which holds a glass field Noryl body containing the check mechanism. The checks are inline modular design. Spring tension is contained when the checks are removed from the body. Production of the 2 1/2"-10" began in 1998. The 12" began in 2007. The 2 1/2"-12" body is made of epoxy coated ductile iron. The check springs are contained. The checks are a glass filled Noryl. Modular checks are contained in the body by clips. The spring tension is contained when the checks are removed from the body. Do not relieve spring tension when changing the check discs. The model 350 is a straight horizontal piping orientation. The model 450 is able to be changed to provide an up and down or vertical piping orientation. Repair parts will be the same in both models. In 2004 the 350 became available in an "A" model. The A model uses a grooved end valve body configuration as opposed to a flanged end valve body.

  • 350ASTDA

    350ASTDA

    Designed for installation on water lines in fire protection systems to protect against both backsiphonage and backpressure of polluted water into the potable water supply. Model 350ASTDA shall provide protection where a potential health hazard does not exist. Incorporates metered by-pass to detect leaks and unauthorized water use. Ideal for use where Lead Free* valves are required.

  • 450DA

    450DA

    The Wilkins 450 and 450DA are double check assemblies. Production of the 3/4"-2" began in 2004. The 3/4"-2" use a bronze housing which holds a glass field Noryl body containing the check mechanism. The checks are inline modular design. Spring tension is contained when the checks are removed from the body. Production of the 2 1/2"-10" began in 1998. The 12" began in 2007. The 2 1/2"-12" body is made of epoxy coated ductile iron. The check springs are contained. The checks are a glass filled Noryl. Modular checks are contained in the body by clips. The spring tension is contained when the checks are removed from the body. Do not relieve spring tension when changing the check discs. The model 350 is a straight horizontal piping orientation. The model Wilkins 450 is able to be changed to provide an up and down or vertical piping orientation. Repair parts will be the same in both models. In 2004 the 350 became available in an "A" model. The A model uses a grooved end valve body configuration as opposed to a flanged end valve body.

  • 375XL

    375XL

    Wilkins 375 Composite body backflow assembly is designed for installation on potable water lines to protect against both backsiphonage and backpressure of contaminated water into the potable water supply. Assembly shall provide protection where a potential health hazard exists. Ideal for use where Lead Free* valves are required.

  • 375ST

    375ST

    Wilkins 375ST was designed for installation on potable water lines to protect against both backsiphonage and backpressure of contaminated water into the potable water supply. The Model 375ST provides protection where a potential ealth hazard exists. The valve's stainless steel construction is ideal in those systems that utilize liquids corrosive to copper alloys. Potential applications include: medical diagnostic equipment, food processing, distilleries, breweries, etc. Additionally, the 375ST is ideal for applications requiring valves that are lead-free*.

  • 975XL2

    975XL2

    The Wilkins 975XL Backflow Preventer is a reduced pressure assembly. Production of the Wilkins 975XL model began in 1990. Starting in 2004 in sizes 3/8" and 1/2" a stainless steel body assembly was also produced. The 3/4"-2" size is a wye pattern poppet style check design with the disc holders made of a glass filled Noryl. The relief valve has an internal relief valve sensing line. The body of the Wilkins 975XL is bronze. There are three versions of check seats available. The 975 version was discontinued in 1992 and had a non-replaceable check seat. The model 975A was discontinued in 1992 and had a replaceable bronze check seat. The model Wilkins 975XL began production in 1993 and had a replaceable check seat made of glass filled Noryl. A seat removal tool is needed. The check discs in the Wilkins 975XL were changed to silicon. The relief valve seat is replaceable. Checks and relief springs are not contained. Ideal for use where Lead Free* valves are required.

  • 975XL2U

    975XL2U

    The Wilkins 975XL Backflow Preventer is a reduced pressure assembly. Production of the Wilkins 975XL model began in 1990. Starting in 2004 in sizes 3/8" and 1/2" a stainless steel body assembly was also produced. The 3/4"-2" size is a wye pattern poppet style check design with the disc holders made of a glass filled Noryl. The relief valve has an internal relief valve sensing line. The body of the Wilkins 975XL is bronze. There are three versions of check seats available. The 975 version was discontinued in 1992 and had a non-replaceable check seat. The model 975A was discontinued in 1992 and had a replaceable bronze check seat. The model Wilkins 975XL began production in 1993 and had a replaceable check seat made of glass filled Noryl. A seat removal tool is needed. The check discs in the Wilkins 975XL were changed to silicon. The relief valve seat is replaceable. Checks and relief springs are not contained. Ideal for use where Lead Free* valves are required.

  • 375A

    375A

    The Wilkins 375 backflow preventer series are reduced pressure assemblies. The checks are an inline modular design. The relief valve uses an internal sensing line. Production of the 2 1/2"-10" began in 1998. The 2 1/2"-10" check body is fused epoxy coated ductile iron. The checks are accessed from a single cover on the top which is attached with a grooved coupler. The checks of the Wilkins 375 backflow series are modular. The springs are contained when the cover is removed. The checks are a glass filled Noryl modular construction and are retained in the body by clips. The spring tension is contained when the checks are removed from the body. Spring tension does not have to be released to change the check discs. The relief valve utilizes an external sensing line. The relief valve body is made of bronze. The relief valve spring is not contained when the cover is removed. The Wilkins model 375 is a horizontal piping orientation. The Wilkins model 475 is able to be changed to provide an up and down or vertical piping orientation. The repair kits for both models will be the same. In 2004 the Wilkins model 375 became available in an "A" model. The Wilkins 375A model uses a grooved end valve body configuration as opposed to the flanged end valve body

  • 375AST

    375AST

    Wilkins 375AST is designed for installation on water lines in fire protection systems to protect against both backsiphonage and backpressure of contaminated water into the potable water supply. The Body is made from stainless steel and the checks are an inline style. Check assemblies are held in with retainer clips and have contained springs. The relief valve is made of bronze with replaceable seat, and spring load is not contained. Ideal for use where Lead Free* valves are required.

  • 475

    475

    The Wilkins 475 and 475ADA are reduced pressure assemblies. Production of the 3/4"-2" began in 2004. The 3/4"-2" uses a bronze housing which holds the glass filled Noryl body which rests in the carriage. The checks are an inline modular design. The relief valve uses an internal sensing line. Production of the 2 1/2"-10" began in 1998. The 2 1/2"-10" check body is fused epoxy coated ductile iron. The checks are accessed from a single cover on the top which is attached with a grooved coupler. The checks are modular. The springs are contained when the cover is removed. The checks are a glass filled Noryl modular construction and are retained in the body by clips. The spring tension is contained when the checks are removed from the body. Spring tension does not have to be released to change the check discs. The relief valve utilizes an external sensing line. The relief valve body is made of bronze. The relief valve spring is not contained when the cover is removed. The model 375 is a horizontal piping orientation. The model Wilkins 475 is able to be changed to provide an up and down or vertical piping orientation. The repair kits for both models will be the same. In 2004 the 375 became available in an "A" model. The A model uses a grooved end valve body configuration as opposed to the flanged end valve body.

  • 475V

    475V

    The Wilkins 475 and 475ADA are reduced pressure assemblies. Production of the 3/4"-2" began in 2004. The 3/4"-2" uses a bronze housing which holds the glass filled Noryl body which rests in the carriage. The checks are an inline modular design. The relief valve uses an internal sensing line. Production of the 2 1/2"-10" began in 1998. The 2 1/2"-10" check body is fused epoxy coated ductile iron. The checks are accessed from a single cover on the top which is attached with a grooved coupler. The checks are modular. The springs are contained when the cover is removed. The checks are a glass filled Noryl modular construction and are retained in the body by clips. The spring tension is contained when the checks are removed from the body. Spring tension does not have to be released to change the check discs. The relief valve utilizes an external sensing line. The relief valve body is made of bronze. The relief valve spring is not contained when the cover is removed. The model 375 is a horizontal piping orientation. The model Wilkins 475 is able to be changed to provide an up and down or vertical piping orientation. The repair kits for both models will be the same. In 2004 the 375 became available in an "A" model. The A model uses a grooved end valve body configuration as opposed to the flanged end valve body.

  • 375ADA

    375ADA

    The Wilkins 375 backflow preventer series are reduced pressure assemblies. The 2 1/2"-10" check body is fused epoxy coated ductile iron. The checks are accessed from a single cover on the top which is attached with a grooved coupler. The checks of the Wilkins 375 backflow series are modular. The springs are contained when the cover is removed. The checks are a glass filled Noryl modular construction and are retained in the body by clips. The spring tension is contained when the checks are removed from the body. Spring tension does not have to be released to change the check discs. The relief valve utilizes an external sensing line. The relief valve body is made of bronze. The relief valve spring is not contained when the cover is removed. The Wilkins model 375 is a horizontal piping orientation. The Wilkins model 475 is able to be changed to provide an up and down or vertical piping orientation. The repair kits for both models will be the same. In 2004 the Wilkins model 375 became available in an "A" model. The Wilkins 375A model uses a grooved end valve body configuration as opposed to the flanged end valve body.

  • 375ASTDA

    375ASTDA

    Designed for installation on water lines in fire protection systems to protect against both backsiphonage and backpressure of contaminated water into the potable water supply. The Model 375ASTDA shall provide protection where a potential health hazard exists. Incorporates metered by-pass to detect leaks and unauthorized water use. Ideal for use where Lead Free* valves are required.
  • 475DA

    475DA

    The Wilkins 475 and 475ADA are reduced pressure assemblies. Production of the 3/4"-2" began in 2004. The 3/4"-2" uses a bronze housing which holds the glass filled Noryl body which rests in the carriage. The checks are an inline modular design. The relief valve uses an internal sensing line. Production of the 2 1/2"-10" began in 1998. The 2 1/2"-10" check body is fused epoxy coated ductile iron. The checks are accessed from a single cover on the top which is attached with a grooved coupler. The checks are modular. The springs are contained when the cover is removed. The checks are a glass filled Noryl modular construction and are retained in the body by clips. The spring tension is contained when the checks are removed from the body. Spring tension does not have to be released to change the check discs. The relief valve utilizes an external sensing line. The relief valve body is made of bronze. The relief valve spring is not contained when the cover is removed. The model 375 is a horizontal piping orientation. The model Wilkins 475 is able to be changed to provide an up and down or vertical piping orientation. The repair kits for both models will be the same. In 2004 the 375 became available in an "A" model. The A model uses a grooved end valve body configuration as opposed to the flanged end valve body.

  • 475DAV

    475DAV

    The Wilkins 475 and 475ADA are reduced pressure assemblies. Production of the 3/4"-2" began in 2004. The 3/4"-2" uses a bronze housing which holds the glass filled Noryl body which rests in the carriage. The checks are an inline modular design. The relief valve uses an internal sensing line. Production of the 2 1/2"-10" began in 1998. The 2 1/2"-10" check body is fused epoxy coated ductile iron. The checks are accessed from a single cover on the top which is attached with a grooved coupler. The checks are modular. The springs are contained when the cover is removed. The checks are a glass filled Noryl modular construction and are retained in the body by clips. The spring tension is contained when the checks are removed from the body. Spring tension does not have to be released to change the check discs. The relief valve utilizes an external sensing line. The relief valve body is made of bronze. The relief valve spring is not contained when the cover is removed. The model 375 is a horizontal piping orientation. The model Wilkins 475 is able to be changed to provide an up and down or vertical piping orientation. The repair kits for both models will be the same. In 2004 the 375 became available in an "A" model. The A model uses a grooved end valve body configuration as opposed to the flanged end valve body.

  • 35XL

    35XL

    Ideal for use where Lead-Free* valves are required. Designed for installation on potable water lines to protect against backsiphonage of contaminated water into the potable water supply. Assembly shall provide protection where a potential health hazard exists.

  • 35XLVCH

    35XLVCH

    Ideal for use where Lead-Free* valves are required. Designed for installation on potable water lines to protect against backsiphonage of contaminated water into the potable water supply. Assembly shall provide protection where a potential health hazard exists.
  • 420XL

    420XL

    The Wilkins 420 PVB is a pressure vacuum breaker assembly. Production of the Wilkins 420 pressure vacuum breaker began in 1998. The body of the Wilkins 420 PVB is bronze. The test cocks are mounted on the ball valves. The air inlet float utilizes a rubber fold not a spring to generate the air inlet loading. The float of the Wilkins 420 pressure vacuum breaker also has a relief valve to protect against damage from freezing. The check of the Wilkins 420 pvb is a modular design with a contained spring and replaceable check seat. Ideal for use where Lead Free* valves are required.

  • 460XL

    460XL

    Ideal for use where Lead-Free* valves are required. Designed for installation on indoor and outdoor point of use applications to protect against backsiphonage of contaminated water into the water supply. During start-up and operation a separate diaphragm seals the air inlet from the water supply preventing spillage. The assembly is designed for use under constant pressure and provides protection where a potential health hazard exists.

  • 720A

    720A

    The Wilkins 720A is a pressure vacuum breaker assembly. Production of the 720A pressure vacuum breaker assembly began approximately in 1975 by SMR . Around 1978 it was sold to the Neptune Meter Co. In 1984 Wilkins regulator bought the rights to produce this assembly. The Wilkins 720A assembly is bronze. The check spring is contained when the bonnet is removed. The check seat is cast in the body and is not replaceable. The A designation in the model number refers to a design change in the air inlet parts. The air inlet utilizes a rubber fold to exert the pressure for the air inlet loading. There is no spring on the air inlet. Before 1994 the test cocks used were a specially designed needle valves that required rotation of the test cock to operate. In 1994 a standard ball valve type test cock was utilized.