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    49 Products

    High-Flow Threaded Check Valves

    To achieve the maximum possible flow, internal components are designed to reduce flow resistance. These valves open to allow flow in one direction and close when flow stops or reverses. A removable cap provides easy access to internal components for maintenance.
    Bronze Body
    Image of Product. Front orientation. Check Valves. High-Flow Threaded Check Valves, Bronze Body.
    Image of Product. Repair Kit for 125 Pressure Class. Front orientation. Contains Inset. Valve Repair Kits. High-Flow Threaded Check Valves, For Pressure Class 125.
    Image of Product. Repair Kit for 200 and 300 Pressure Classes. Front orientation. Valve Repair Kits. High-Flow Threaded Check Valves, For Pressure Class 200.

    Repair Kit for 125

    Pressure Class

    Repair Kit for 200

    and 300 Pressure

    Classes

    Flow Coefficient (Cv)—Flow coefficient (Cv) is the amount of water (in gallons per minute) at 60° F that will flow through a fully open valve with a difference of 1 psi between the inlet and the outlet.
    Repair Kits—Repair kits include everything you need to rebuild the valve.
    Check Valves
    Repair Kits
    Pipe
    Size
    Flow Coefficient
    (Cv)
    Max. Pressure
    @ Temp.
    Max. Steam Pressure
    @ Temp.
    Min. Opening
    Pressure, psi
    Temp. Range,
    ° F
    End-to-End
    Lg.
    Mounting Position
    Features
    Specs.
    Met
    For Use With
    Disc
    Material
    Seal
    Material
    Each
    For Pressure
    Class
    For Pipe
    Size
    Each
    NPT Female Inlet × NPT Female Outlet—Pressure Class 125
    1 1/2 76200 psi @ 150° F125 psi @ 353° F0.5-20 to 4054"Horizontal, VerticalRemovable CapMSS SP-80Air, Argon, Helium, Krypton, Neon, Steam, Water, XenonBrassBrass4708K570000000125
    		1 1/2
    		4708K220000000
     
    NPT Female Inlet × NPT Female Outlet—Pressure Class 150
    1 1/2 56300 psi @ 150° F150 psi @ 366° F0.5-20 to 4054 5/8"Horizontal, VerticalRemovable CapMSS SP-80Air, Argon, Helium, Krypton, Neon, Steam, Water, XenonBrassBrass9773K57000000—————0
     
    NPT Female Inlet × NPT Female Outlet—Pressure Class 200
    1 1/2 56400 psi @ 150° F200 psi @ 388° F0.5-20 to 5504 5/8"Horizontal, VerticalRemovable CapMSS SP-80Air, Argon, Helium, Krypton, Neon, Steam, Water, XenonBronzeBronze9770K67000000200, 300
    		1 1/2
    		9770K112000000
     
    NPT Female Inlet × NPT Female Outlet—Pressure Class 300
    1 1/2 56600 psi @ 150° F300 psi @ 422° F0.5-20 to 5504 5/8"Horizontal, VerticalRemovable CapMSS SP-80Air, Argon, Helium, Krypton, Neon, Steam, Water, XenonBronzeBronze9770K77000000200, 300
    		1 1/2
    		9770K112000000
     
    316 Stainless Steel Body
    Image of Product. Front orientation. Check Valves. High-Flow Threaded Check Valves, 316 Stainless Steel Body.
    316 stainless steel valves are more corrosion resistant than bronze valves.
    Flow Coefficient (Cv)—Flow coefficient (Cv) is the amount of water (in gallons per minute) at 60° F that will flow through a fully open valve with a difference of 1 psi between the inlet and the outlet.
    Pipe
    Size
    Flow Coefficient
    (Cv)
    Max. Pressure
    @ Temp.
    Max. Steam Pressure
    @ Temp.
    Min. Opening
    Pressure, psi
    Temp. Range,
    ° F
    End-to-End
    Lg.
    Mounting Position
    Features
    For Use With
    Disc Material
    Seal
    Material
    Each
    NPT Female Inlet × NPT Female Outlet—Pressure Class Not Rated
    1 1/2 264200 psi @ 70° F150 psi @ 350° F0.5-20 to 4004 11/16"Horizontal, VerticalRemovable CapAir, Steam, Water316 Stainless Steel
    		PTFE
    		46635K680000000
     

    Threaded Check Valves

    These valves open to allow flow in one direction and close when flow stops or reverses.
    Connectors, NPT Female Inlet × NPT Female Outlet
    Image of Product. Female Inlet × Female Outlet. Front orientation. Contains Annotated. Female. Threaded Check Valves, Female.
    Image of Specification. Flared Angle Connector. Front orientation. Contains Annotated. Connector Fitting. Threaded Check Valves.

    Female Inlet × Female

    Outlet

    Flared Angle Connector

    Nickel-Plated Brass Body—Nickel-plated brass valves are more corrosion resistant than plain brass or bronze valves.
    Flow Coefficient (Cv)—Flow coefficient (Cv) is the amount of water (in gallons per minute) at 60° F that will flow through a fully open valve with a difference of 1 psi between the inlet and the outlet.
    Pipe
    Size
    Flow Coefficient
    (Cv)
    Max. Pressure
    @ Temp.
    Max. Steam Pressure
    @ Temp.
    Min. Opening
    Pressure, psi
    Temp. Range,
    ° F
    Spring Material
    Seal Material
    End-to-End
    Lg.
    For Use With
    Each
    Brass Body—Buna-N Spring-Loaded Piston
    1 1/2
    		32400 psi @ 70° F—235 to 225302 Stainless Steel
    		Buna-N
    		4 7/8"Air, Argon, Helium, Krypton, Neon, Oil, Water, Xenon7746K8520000000
     
    Brass Body—304 Stainless Steel Spring-Loaded Piston
    1 1/2
    		39400 psi @ 70° F125 psi @ 350° F235 to 350302 Stainless Steel
    		303 Stainless Steel
    		4 7/8"Air, Argon, Helium, Krypton, Neon, Oil, Steam, Water, Xenon4753K46000000
     
    Nickel-Plated Brass Body—304 Stainless Steel Spring-Loaded Piston
    1 1/2
    		39400 psi @ 70° F125 psi @ 350° F235 to 350302 Stainless Steel
    		303 Stainless Steel
    		4 7/8"Air, Argon, Helium, Krypton, Neon, Oil, Steam, Water, Xenon4753K56000000
     
    Bronze Body—PTFE Spring-Loaded Ball
    1 1/2
    		65400 psi @ 70° F125 psi @ 350° F0.5-20 to 405Stainless Steel
    		PTFE
    		4 15/16"Air, Argon, Helium, Krypton, Neon, Steam, Water, Xenon47715K27000000
     
    Adapters, NPT Male Inlet × NPT Female Outlet
    Image of Product. Male Inlet × Female Outlet. Front orientation. Contains Annotated. Female. Threaded Check Valves, Male.
    Image of Specification. Flared Angle Adapter. Front orientation. Contains Annotated. Adapter. Threaded Check Valves.

    Male Inlet × Female

    Outlet

    Flared Angle Adapter

    Flow Coefficient (Cv)—Flow coefficient (Cv) is the amount of water (in gallons per minute) at 60° F that will flow through a fully open valve with a difference of 1 psi between the inlet and the outlet.
    Pipe
    Size
    Flow Coefficient
    (Cv)
    Max. Pressure
    @ Temp.
    Max. Steam Pressure
    @ Temp.
    Min. Opening
    Pressure, psi
    Temp. Range,
    ° F
    Spring
    Material
    Seal
    Material
    End-to-End
    Lg.
    For Use With
    Each
    Bronze Body—PTFE Spring-Loaded Ball
    1 1/2
    		65400 psi @ 70° F125 psi @ 350° F0.5-20 to 405Stainless Steel
    		PTFE
    		5 3/16"Air, Argon, Helium, Krypton, Neon, Steam, Water, Xenon47715K470000000
     
    Connectors, BSPT Female Inlet × BSPT Female Outlet
    Image of Product. Female Inlet × Female Outlet. Front orientation. Contains Annotated. Female. Threaded Check Valves, Female.
    Image of Specification. Flared Angle Connector. Front orientation. Contains Annotated. Connector Fitting. Threaded Check Valves.

    Female Inlet × Female

    Outlet

    Flared Angle Connector

    Flow Coefficient (Cv)—Flow coefficient (Cv) is the amount of water (in gallons per minute) at 60° F that will flow through a fully open valve with a difference of 1 psi between the inlet and the outlet.
    Pipe
    Size
    Flow Coefficient
    (Cv)
    Max. Pressure
    @ Temp.
    Max. Steam Pressure
    @ Temp.
    Min. Opening
    Pressure, psi
    Temp. Range,
    ° F
    Spring Material
    Seal Material
    End-to-End
    Lg.
    For Use With
    Each
    Brass Body—304 Stainless Steel Spring-Loaded Piston
    1 1/2
    		35400 psi @ 70° F125 psi @ 350° F235 to 350302 Stainless Steel
    		304 Stainless Steel
    		4 7/8"Air, Argon, Helium, Krypton, Neon, Oil, Steam, Water, Xenon4753K1060000000
     

    Easy-Install Threaded Check Valves for Harsh Chemicals

    To reduce installation time and allow for maintenance without detaching pipe connections, these valves have union fittings. The plastic body and fluoroelastomer seal provide excellent chemical resistance. Valves open to allow flow in one direction and close when flow stops or reverses.
    PVC Body—Ball
    Image of Product. Assembled View. Front orientation. Check Valves. Easy-Install Threaded Check Valves for Harsh Chemicals.
    Image of Product. Exploded View. Front orientation. Exploded view. Check Valves. Easy-Install Threaded Check Valves for Harsh Chemicals.

    Assembled View

    Exploded View

    PVC and CPVC valves come with unthreaded socket-connect female fittings in addition to the threaded NPT female fittings.
    For Drinking Water—Valves for drinking water meet NSF/ANSI 61.
    Flow Coefficient (Cv)—Flow coefficient (Cv) is the amount of water (in gallons per minute) at 60° F that will flow through a fully open valve with a difference of 1 psi between the inlet and the outlet.
    Pipe
    Size
    Flow Coefficient
    (Cv)
    Max. Pressure
    @ Temp.
    Min. Opening
    Pressure, psi
    Temp. Range,
    ° F
    Color
    End-to-End
    Lg.
    Mounting Position
    Specs.
    Met
    Food Industry
    Std.
    For Use With
    Ball
    Material
    Seal Material
    Each
    NPT Female × NPT Female
    1 1/2 45150 psi @ 70° F140 to 140Dark Gray6 3/4"Horizontal, VerticalASTM D1784NSF/ANSI 61
    		Citric Acid, Diesel Fuel, Drinking Water, Ethylene Glycol, Hydrochloric Acid, Isopropyl Alcohol, Kerosene, Nitric Acid, Oil, Phosphoric Acid, Salt Water, Sodium Hypochlorite (Bleach), WaterPVC
    		Fluoroelastomer
    		4721K170000000
     
    CPVC Body—Ball
    Image of Product. Assembled View. Front orientation. Check Valves. Easy-Install Threaded Check Valves for Harsh Chemicals.
    Image of Product. Exploded View. Front orientation. Exploded view. Check Valves. Easy-Install Threaded Check Valves for Harsh Chemicals.

    Assembled View

    Exploded View

    PVC and CPVC valves come with unthreaded socket-connect female fittings in addition to the threaded NPT female fittings.
    For Drinking Water—Valves for drinking water meet NSF/ANSI 61.
    Flow Coefficient (Cv)—Flow coefficient (Cv) is the amount of water (in gallons per minute) at 60° F that will flow through a fully open valve with a difference of 1 psi between the inlet and the outlet.
    Pipe
    Size
    Flow Coefficient
    (Cv)
    Max. Pressure
    @ Temp.
    Min. Opening
    Pressure, psi
    Temp. Range,
    ° F
    Color
    End-to-End
    Lg.
    Mounting Position
    Specs.
    Met
    Food Industry
    Std.
    For Use With
    Ball
    Material
    Seal Material
    Each
    NPT Female × NPT Female
    1 1/2 45150 psi @ 70° F135 to 190Light Gray6 3/4"Horizontal, VerticalASTM D1784NSF/ANSI 61
    		Citric Acid, Diesel Fuel, Drinking Water, Hydrochloric Acid, Isopropyl Alcohol, Kerosene, Nitric Acid, Phosphoric Acid, Salt Water, Sodium Hypochlorite (Bleach), WaterCPVC
    		Fluoroelastomer
    		4810K350000000
     
    Polypropylene Body—Ball
    Image of Product. Assembled View. Front orientation. Check Valves. Easy-Install Threaded Check Valves for Harsh Chemicals.
    Image of Product. Exploded View. Front orientation. Exploded view. Check Valves. Easy-Install Threaded Check Valves for Harsh Chemicals.

    Assembled View

    Exploded View

    Polypropylene valves are more corrosion resistant than PVC or CPVC valves.
    Flow Coefficient (Cv)—Flow coefficient (Cv) is the amount of water (in gallons per minute) at 60° F that will flow through a fully open valve with a difference of 1 psi between the inlet and the outlet.
    Pipe
    Size
    Flow Coefficient
    (Cv)
    Max. Pressure
    @ Temp.
    Min. Opening
    Pressure, psi
    Temp. Range,
    ° F
    Color
    End-to-End
    Lg.
    Mounting Position
    Specs.
    Met
    For Use With
    Ball
    Material
    Seal Material
    Each
    NPT Female × NPT Female
    1 1/2 45150 psi @ 70° F135 to 160White6 3/4"Horizontal, VerticalASTM D4101Air, Ammonia, Butane, Carbon Dioxide, Citric Acid, Deionized Water, Ethanol, Ethylene Glycol, Isopropyl Alcohol, Kerosene, Methanol (Methyl Alcohol), Natural Gas, Oil, Oxygen, Phosphoric Acid, Salt Water, Soap Solutions, Sodium Hydroxide (Caustic Soda), WaterPolypropylene
    		Fluoroelastomer
    		4851K440000000
     

    Sump Pump Backflow-Prevention Valves with Clamps

    Image of Product. Front orientation. Sump Pump Backflow-Prevention Valves. Sump Pump Backflow-Prevention Valves with Clamps.
    Prevent dirty water from flowing back to your pump. Valves have flexible couplers with hose clamps to slip over PVC tubing for easy installation. At least 2 psi is required to open valves. Install for horizontal or upward flow.
    Pipe Size
    Max. Pressure
    @ Temp.
    Max. Flow Rate @
    10 ft. of Head, gpm
    Temp. Range,
    ° F
    Body
    Material
    Color
    Seal Material
    End-to-End
    Lg.
    Each
    1 1/4, 1 1/2
    		25 psi @ 70° F4.335 to 130ABS
    		BlackEPDM/Stainless Steel
    		4 13/16"7744K11000000

    High-Temperature Threaded Check Valves

    The heat-resistant rubber seal withstands temperatures up to 500° F. These valves open to allow flow in one direction and close when flow stops or reverses.
    Bronze Body—Poppet
    Image of Product. 1 1/2 to 3 Pipe Size Bronze. Front orientation. Check Valves. High-Temperature Threaded Check Valves, Bronze Body—Poppet.
    Image of Product. Repair Kit for 1 1/2 to 3 Pipe Size Bronze Valves and 303 Stainless Steel Valves. Front orientation. Valve Repair Kits. High-Temperature Threaded Check Valves, Poppet Check Valve.

    1 1/2 to 3 Pipe Size Bronze

    Repair Kit for 1

    1/2 to 3 Pipe Size

    Bronze Valves

    and 303 Stainless

    Steel Valves

    Use bronze valves when corrosion is not a concern.
    Flow Coefficient (Cv)—Flow coefficient (Cv) is the amount of water (in gallons per minute) at 60° F that will flow through a fully open valve with a difference of 1 psi between the inlet and the outlet.
    Repair Kits—Repair kits include everything you need to rebuild the valve.
    Check Valves
    Repair Kits
    Pipe
    Size
    Flow Coefficient
    (Cv)
    Max. Pressure
    @ Temp.
    Min. Opening
    Pressure, psi
    Temp. Range,
    ° F
    End-to-End
    Lg.
    Mounting Position
    For Use With
    Spring Material
    Seal Material
    Each
    For Pipe
    Size
    Each
    NPT Female Inlet × NPT Female Outlet
    1 1/2 38400 psi @ 70° F10 to 5004 7/8"Horizontal, VerticalAir, Argon, Helium, Krypton, Neon, Oil, Water, Xenon302 Stainless Steel
    		Fluoroelastomer
    		7295N11100000001 1/2
    		7295N125000000
     
    303 Stainless Steel Body—Poppet
    Image of Product. Front orientation. Check Valves. High-Temperature Threaded Check Valves, 303 Stainless Steel Body—Poppet.
    Image of Product. Repair Kit for 1 1/2 to 3 Pipe Size Bronze Valves and 303 Stainless Steel Valves. Front orientation. Valve Repair Kits. High-Temperature Threaded Check Valves, Poppet Check Valve.

    Repair Kit for 1

    1/2 to 3 Pipe Size

    Bronze Valves

    and 303 Stainless

    Steel Valves

    303 stainless steel valves are more corrosion resistant than bronze valves.
    Flow Coefficient (Cv)—Flow coefficient (Cv) is the amount of water (in gallons per minute) at 60° F that will flow through a fully open valve with a difference of 1 psi between the inlet and the outlet.
    Repair Kits—Repair kits include everything you need to rebuild the valve.
    Check Valves
    Repair Kits
    Pipe
    Size
    Flow Coefficient
    (Cv)
    Max. Pressure
    @ Temp.
    Min. Opening
    Pressure, psi
    Temp. Range,
    ° F
    End-to-End
    Lg.
    Mounting Position
    For Use With
    Spring Material
    Seal Material
    Each
    For Pipe
    Size
    Each
    NPT Female Inlet × NPT Female Outlet
    1 1/2 32600 psi @ 70° F10 to 5004 7/8"Horizontal, VerticalAir, Argon, Helium, Krypton, Neon, Oil, Water, Xenon302 Stainless Steel
    		Fluoroelastomer
    		7295N11900000001 1/2
    		7295N125000000
     

    Compact Flange-Mount Check Valves

    Less than half the end-to-end length of standard flange-mount check valves, these can be installed between ANSI flanges in pipelines with limited clearance. ANSI flanges are sold separately. Valves open to allow flow in one direction and close when flow stops or reverses. All have a 316 stainless steel body for excellent corrosion resistance.
    316 Stainless Steel Body—Spring-Loaded Piston
    Image of System. Shown with Flanges (Not Included). Front orientation. Contains MultipleImages. Check Valves. Compact Flange-Mount Check Valves.
    Image of Product. Front orientation. Check Valves. Compact Flange-Mount Check Valves.

    Shown with Flanges (Not

    Included)

    Flow Coefficient (Cv)—Flow coefficient (Cv) is the amount of water (in gallons per minute) at 60° F that will flow through a fully open valve with a difference of 1 psi between the inlet and the outlet.
    Pipe
    Size
    Flow Coefficient
    (Cv)
    Max. Pressure
    @ Temp.
    Min. Opening
    Pressure, psi
    Temp. Range,
    ° F
    End-to-End
    Lg.
    Mounting Position
    For Flange
    Class
    For Use With
    Piston Material
    Spring Material
    Seal Material
    Each
    Flanged × Flanged
    1 1/2 18.8720 psi @ 100° F0.5-10 to 4001/4"Any Angle, Horizontal, Vertical150, 300
    		Air, Argon, Helium, Krypton, Neon, Water, Xenon316 Stainless Steel
    		316 Stainless Steel
    		Viton® Fluoroelastomer
    		1969N150000000
     

    Socket-Connect Check Valves for Drinking Water

    Insert unthreaded pipe into the socket ends and bond with primer and cement to create a permanent, leak-tight connection. These valves meet NSF/ANSI 61, which means they’re safe to use with drinking water. They open to allow flow in one direction and close when flow stops or reverses.
    PVC Body—Spring-Loaded Piston
    Image of Product. Front orientation. Check Valves. Socket-Connect Check Valves for Drinking Water, PVC Body—Spring-Loaded Piston.
    Spring-loaded piston check valves reduce slamming and vibration in quick shut-off applications.
    White
    Pipe
    Size
    For Pipe
    Schedule
    Max. Pressure
    @ Temp.
    Min. Opening
    Pressure, psi
    Temp. Range,
    ° F
    End-to-End
    Lg.
    For Use With
    Piston
    Material
    Spring Material
    Seal
    Material
    Each
    Socket Connect × Socket Connect
    1 1/2 40
    		200 psi @ 70° F0.535 to 1406 3/16"Drinking WaterPVC
    		302 Stainless Steel
    		EPDM
    		46835K56000000
     
    PVC Body—Swing
    Image of Product. Front orientation. Check Valves. Socket-Connect Check Valves for Drinking Water, PVC Body—Swing.
    Swing check valves create less flow resistance than spring-loaded piston check valves.
    Clear—Clear valves let you visually inspect flow and debris accumulation.
    White
    Clear
    Pipe
    Size
    For Pipe
    Schedule
    Max. Pressure
    @ Temp.
    Min. Opening
    Pressure, psi
    Temp. Range,
    ° F
    End-to-End
    Lg.
    For Use With
    Disc
    Material
    Seal
    Material
    Each
    Each
    Socket Connect × Socket Connect
    1 1/2 40
    		125 psi @ 70° F0.535 to 1405 3/8"Drinking WaterEPDM
    		EPDM
    		45275K560000006274T96000000
     

    Socket-Connect Check Valves

    Insert unthreaded pipe into the socket ends and weld to create a permanent, leak-tight connection. These valves open to allow flow in one direction and close when flow stops or reverses. The valve body is 316 stainless steel for excellent corrosion resistance. A removable cap provides easy access to internal components for maintenance.
    316 Stainless Steel Body
    Image of Product. Front orientation. Check Valves. Socket-Connect Check Valves.
    Flow Coefficient (Cv)—Flow coefficient (Cv) is the amount of water (in gallons per minute) at 60° F that will flow through a fully open valve with a difference of 1 psi between the inlet and the outlet.
    Pipe
    Size
    Flow Coefficient
    (Cv)
    Max. Pressure
    @ Temp.
    Max. Steam Pressure
    @ Temp.
    Min. Opening
    Pressure, psi
    Temp. Range,
    ° F
    End-to-End
    Lg.
    Mounting Position
    Features
    Specs.
    Met
    For Use With
    Disc Material
    Seal
    Material
    Each
    Socket Connect × Socket Connect—Pressure Class 200
    1 1/2 72200 psi @ 70° F150 psi @ 350° F0.5-20 to 4004 11/16"Horizontal, VerticalRemovable CapASTM A351Argon, Helium, Krypton, Neon, Steam, Water, Xenon316 Stainless Steel
    		PTFE
    		7766K570000000
     

    Threaded Check Valves for Drinking Water

    These valves meet NSF/ANSI 61 for drinking water service. They open to allow flow in one direction and close when flow stops or reverses.
    PVC Body—Spring-Loaded Piston
    Image of Product. Front orientation. Check Valves. Threaded Check Valves for Drinking Water, PVC Body—Spring-Loaded Piston.
    Spring-loaded piston check valves reduce slamming and vibration in quick shut-off applications.
    White
    Pipe
    Size
    Max. Pressure
    @ Temp.
    Min. Opening
    Pressure, psi
    Temp. Range,
    ° F
    End-to-End
    Lg.
    For Use With
    Piston
    Material
    Spring Material
    Seal
    Material
    Each
    NPT Female × NPT Female
    1 1/2 200 psi @ 70° F0.535 to 1406 3/16"Drinking WaterPVC
    		302 Stainless Steel
    		EPDM
    		46835K36000000
     
    PVC Body—Swing
    Image of Product. Front orientation. Check Valves. Threaded Check Valves for Drinking Water, PVC Body—Swing.
    Swing check valves create less flow resistance than spring-loaded piston check valves.
    Clear—Clear valves let you visually inspect flow and debris accumulation.
    White
    Clear
    Pipe
    Size
    Max. Pressure
    @ Temp.
    Min. Opening
    Pressure, psi
    Temp. Range,
    ° F
    End-to-End
    Lg.
    For Use With
    Disc
    Material
    Seal
    Material
    Each
    Each
    NPT Female × NPT Female
    1 1/2 125 psi @ 70° F0.535 to 1405 3/8"Drinking WaterEPDM
    		EPDM
    		45275K460000006274T86000000
     

    High-Performance Threaded Check Valves for Fuel

    These heavy duty valves can withstand pressures up to 1,975 psi and temperatures up to 800° F. They open to allow flow in one direction and close when flow stops or reverses. All have a removable cap that provides easy access to internal components for maintenance.
    Steel Body—Spring-Loaded Piston
    Image of Product. Front orientation. Check Valves. High-Performance Threaded Check Valves for Fuel.
    Flow Coefficient (Cv)—Flow coefficient (Cv) is the amount of water (in gallons per minute) at 60° F that will flow through a fully open valve with a difference of 1 psi between the inlet and the outlet.
    Pipe
    Size
    Flow Coefficient
    (Cv)
    Max. Pressure
    @ Temp.
    Min. Opening
    Pressure, psi
    Temp. Range,
    ° F
    End-to-End
    Lg.
    Mounting Position
    Features
    Specs. Met
    For Use With
    Piston Material
    Spring Material
    Seal Material
    Each
    NPT Female Inlet × NPT Female Outlet—Pressure Class 800
    1 1/2 14.091,975 psi @ 100° F63-20 to 8006"Any Angle, Horizontal, VerticalRemovable CapAPI Std 598, API Std 602, ASME B16.34Diesel Fuel, Natural Gas420 Stainless Steel
    		304 Stainless Steel
    		304 Stainless Steel/Graphite4895K670000000
     
    Steel Body—Spring-Loaded Ball
    Image of Product. Front orientation. Check Valves. High-Performance Threaded Check Valves for Fuel.
    Spring-loaded ball check valves resist sticking and clogging better than spring-loaded piston check valves.
    Flow Coefficient (Cv)—Flow coefficient (Cv) is the amount of water (in gallons per minute) at 60° F that will flow through a fully open valve with a difference of 1 psi between the inlet and the outlet.
    Pipe
    Size
    Flow Coefficient
    (Cv)
    Max. Pressure
    @ Temp.
    Min. Opening
    Pressure, psi
    Temp. Range,
    ° F
    End-to-End
    Lg.
    Mounting Position
    Features
    Specs. Met
    For Use With
    Ball Material
    Spring Material
    Seal Material
    Each
    NPT Female Inlet × NPT Female Outlet—Pressure Class 800
    1 1/2 14.11,975 psi @ 100° F527-20 to 8006"Any Angle, Horizontal, VerticalRemovable CapAPI Std 598, API Std 602, ASME B16.34Diesel Fuel, Natural Gas304 Stainless Steel
    		304 Stainless Steel
    		304 Stainless Steel/Graphite4618K750000000
     

    Plastic Socket-Connect Check Valves

    Also known as backwater valves, these valves prevent backflow of sewage and wastewater in drain, waste, and vent systems. Insert unthreaded pipe into the socket ends and bond with primer and cement to create a permanent, leak-tight connection. Valves open to allow flow in one direction and close when flow stops or reverses. A removable cap provides easy access to internal components for maintenance.
    PVC Body—Swing
    Image of Product. Front orientation. Check Valves. Plastic Socket-Connect Check Valves, PVC Body—Swing.
    Image of Product. Front orientation. Check Valve Flappers. Plastic Socket-Connect Check Valves.

    Replacement

    Flappers

    Check Valves
    Replacement
    Flappers
    Pipe
    Size
    For Pipe
    Schedule
    Max. Pressure
    @ Temp.
    Min. Opening
    Pressure, psi
    Temp. Range,
    ° F
    Color
    End-to-End
    Lg.
    Mounting
    Position
    Features
    For Use
    With
    Pressure
    Class
    Disc
    Material
    Seal
    Material
    Each
    Each
    Socket Connect × Socket Connect
    1 1/2 40
    		60 psi @ 140° F035 to 140White4 3/16"HorizontalRemovable CapWaterNot RatedPVC
    		PVC
    		4670K120000004670K31000000
     

    Socket-Connect Check Valves for Harsh Chemicals

    Insert unthreaded pipe into the socket ends and bond with primer and cement to create a permanent, leak-tight connection. These valves have a plastic body and a fluoroelastomer seal for excellent chemical resistance. They open to allow flow in one direction and close when flow stops or reverses.
    PVC Body—Spring-Loaded Piston
    Image of Product. Front orientation. Check Valves. Socket-Connect Check Valves for Harsh Chemicals.
    Flow Coefficient (Cv)—Flow coefficient (Cv) is the amount of water (in gallons per minute) at 60° F that will flow through a fully open valve with a difference of 1 psi between the inlet and the outlet.
    Pipe
    Size
    For Pipe
    Schedule
    Flow Coefficient
    (Cv)
    Max. Pressure
    @ Temp.
    Min. Opening
    Pressure, psi
    Temp. Range,
    ° F
    Color
    End-to-End
    Lg.
    Mounting Position
    Specs.
    Met
    For Use With
    Piston
    Material
    Spring
    Material
    Seal Material
    Each
    Socket Connect × Socket Connect—Pressure Class Not Rated
    1 1/2 40, 80
    		45150 psi @ 70° F240 to 140Dark Gray6 5/8"Horizontal, VerticalASTM D1784Citric Acid, Deionized Water, Diesel Fuel, Ethylene Glycol, Hydrochloric Acid, Isopropyl Alcohol, Kerosene, Mineral Spirits, Nitric Acid, Oil, Phosphoric Acid, Salt Water, Sodium Hypochlorite (Bleach), WaterPVC
    		PVC
    		Fluoroelastomer
    		1939N50000000
     
    CPVC Body—Spring-Loaded Piston
    Image of Product. Front orientation. Check Valves. Socket-Connect Check Valves for Harsh Chemicals.
    Flow Coefficient (Cv)—Flow coefficient (Cv) is the amount of water (in gallons per minute) at 60° F that will flow through a fully open valve with a difference of 1 psi between the inlet and the outlet.
    Pipe
    Size
    For Pipe
    Schedule
    Flow Coefficient
    (Cv)
    Max. Pressure
    @ Temp.
    Min. Opening
    Pressure, psi
    Temp. Range,
    ° F
    Color
    End-to-End
    Lg.
    Mounting Position
    Specs.
    Met
    For Use With
    Piston
    Material
    Spring
    Material
    Seal Material
    Each
    Socket Connect × Socket Connect—Pressure Class Not Rated
    1 1/2 40, 80
    		45150 psi @ 70° F240 to 190Light Gray6 5/8"Horizontal, VerticalASTM D1784Citric Acid, Deionized Water, Diesel Fuel, Hydrochloric Acid, Isopropyl Alcohol, Kerosene, Mineral Spirits, Nitric Acid, Oil, Phosphoric Acid, Salt Water, Sodium Hypochlorite (Bleach), WaterCPVC
    		CPVC
    		Fluoroelastomer
    		1939N150000000
     

    Check Valves for Steam

    To withstand high pressures and temperatures in steam service applications, these valves have a 316 stainless steel body, PTFE ball, and PTFE seal. They open to allow flow in one direction and close when flow stops or reverses.
    316 Stainless Steel Body—Spring-Loaded Ball
    Image of Product. Front orientation. Check Valves. Check Valves for Steam.
    Image of Product. Front orientation. Valve Repair Kits. Check Valves for Steam.

    Repair Kits

    Flow Coefficient (Cv)—Flow coefficient (Cv) is the amount of water (in gallons per minute) at 60° F that will flow through a fully open valve with a difference of 1 psi between the inlet and the outlet.
    Repair Kits—Repair kits include everything you need to rebuild the valve.
    Check Valves
    Repair Kits
    Pipe
    Size
    Flow Coefficient
    (Cv)
    Max. Steam Pressure
    @ Temp.
    Min. Opening
    Pressure, psi
    Temp. Range,
    ° F
    End-to-End
    Lg.
    Mounting Position
    For Use
    With
    Ball
    Material
    Spring Material
    Seal
    Material
    Each
    For Pipe
    Size
    Each
    NPT Female Inlet × NPT Female Outlet
    1 1/2 65125 psi @ 350° F0.5-5 to 3504 15/16"Horizontal, VerticalSteamPTFE
    		316 Stainless Steel
    		PTFE
    		47885K7700000001 1/2
    		47885K17000000
     

    High-Cycling Threaded Check Valves

    With few moving parts to wear out, these valves withstand frequent opening and closing, pulsating flow, and rapid flow reversal. They open to allow flow in one direction and close when flow stops or reverses. All have a removable cap that provides easy access to internal components for maintenance.
    Bronze Body
    Image of Product. Front orientation. Check Valves. High-Cycling Threaded Check Valves.
    Flow Coefficient (Cv)—Flow coefficient (Cv) is the amount of water (in gallons per minute) at 60° F that will flow through a fully open valve with a difference of 1 psi between the inlet and the outlet.
    Pipe
    Size
    Flow Coefficient
    (Cv)
    Max. Pressure
    @ Temp.
    Max. Steam Pressure
    @ Temp.
    Min. Opening
    Pressure, psi
    Temp. Range,
    ° F
    End-to-End
    Lg.
    Mounting
    Position
    Features
    Specs.
    Met
    For Use With
    Disc
    Material
    Seal
    Material
    Each
    NPT Female Inlet × NPT Female Outlet—Pressure Class 125
    1 1/2 21.83200 psi @ 70° F175 psi @ 353° F2-20 to 4053 7/8"HorizontalRemovable CapMSS SP-80Air, Argon, Helium, Krypton, Neon, Steam, Water, XenonBronzeBronze4894K150000000
     
    NPT Female Inlet × NPT Female Outlet—Pressure Class 300
    1 1/2 21.831,000 psi @ 70° F520 psi @ 421° F2-20 to 4504 5/8"HorizontalRemovable CapMSS SP-80Air, Argon, Helium, Krypton, Neon, Steam, Water, XenonBronzeBronze4894K85000000
     

    Heavy Duty Threaded Check Valves for Drinking Water

    For more durability than plastic, these valves have a metal body. They meet NSF/ANSI 61 for drinking water service. All open to allow flow in one direction and close when flow stops or reverses.
    Brass Body—Spring-Loaded Piston
    Image of Product. Front orientation. Check Valves. Heavy Duty Threaded Check Valves for Drinking Water.
    Flow Coefficient (Cv)—Flow coefficient (Cv) is the amount of water (in gallons per minute) at 60° F that will flow through a fully open valve with a difference of 1 psi between the inlet and the outlet.
    Pipe
    Size
    Flow Coefficient
    (Cv)
    Max. Pressure
    @ Temp.
    Min. Opening
    Pressure, psi
    Temp. Range,
    ° F
    End-to-End
    Lg.
    Mounting Position
    Food Industry
    Std.
    For Use With
    Piston
    Material
    Spring Material
    Seal
    Material
    Each
    NPT Female Inlet × NPT Female Outlet
    1 1/2 39.1400 psi @ 170° F0.510 to 2103 5/16"Any Angle, Horizontal, VerticalNSF/ANSI 61
    		Drinking WaterPEI302 Stainless Steel
    		Buna-N
    		8517T27000000
     

    Butt-Weld Check Valves

    Weld these valves to unthreaded pipe for a smooth, flush connection that provides maximum flow. All open to allow flow in one direction and close when flow stops or reverses. They have a 316 stainless steel body for excellent corrosion resistance.
    316 Stainless Steel Body—Spring-Loaded Piston
    Image of Product. Front orientation. Check Valves. Butt-Weld Check Valves.
    Flow Coefficient (Cv)—Flow coefficient (Cv) is the amount of water (in gallons per minute) at 60° F that will flow through a fully open valve with a difference of 1 psi between the inlet and the outlet.
    Pipe
    Size
    For Pipe
    Schedule
    Flow Coefficient
    (Cv)
    Max. Pressure
    @ Temp.
    Min. Opening
    Pressure, psi
    Temp. Range,
    ° F
    End-to-End
    Lg.
    Mounting Position
    Specs. Met
    For Use With
    Piston Material
    Spring Material
    Seal Material
    Each
    Butt Weld × Butt Weld
    1 1/2 40
    		18.81,500 psi @ 100° F0.5-10 to 4003 15/16"Any Angle, Horizontal, VerticalASME B16.25Air, Argon, Helium, Krypton, Neon, Water, Xenon316 Stainless Steel
    		316 Stainless Steel
    		Viton® Fluoroelastomer
    		1971N150000000
     

    Clear-View Socket-Connect Check Valves

    Visually inspect flow and debris accumulation through the transparent valve body. Insert unthreaded pipe into the socket ends and bond with primer and cement to create a permanent, leak-tight connection. These valves open to allow flow in one direction and close when flow stops or reverses. They have a removable cap that provides easy access to internal components for maintenance.
    PVC Body
    Image of Product. Front orientation. Check Valves. Clear-View Socket-Connect Check Valves.
    Flow Coefficient (Cv)—Flow coefficient (Cv) is the amount of water (in gallons per minute) at 60° F that will flow through a fully open valve with a difference of 1 psi between the inlet and the outlet.
    Pipe
    Size
    For Pipe
    Schedule
    Flow Coefficient
    (Cv)
    Max. Pressure
    @ Temp.
    Min. Opening
    Pressure, psi
    Temp. Range,
    ° F
    Color
    End-to-End
    Lg.
    Mounting Position
    Features
    Specs. Met
    For Use
    With
    Piston
    Material
    Seal
    Material
    Each
    Socket Connect × Socket Connect
    1 1/2 40, 80
    		49150 psi @ 70° F0.2935 to 140Clear8 1/8"Any Angle, Horizontal, VerticalRemovable CapASTM D1784, ASTM D1785Air, WaterPVC
    		EPDM
    		4754K560000000
     

    Union-Insert Check Valves

    To reduce installation time and allow for maintenance without detaching pipe connections, these valves insert into a union fitting. Union fittings are sold separately. Valves open to allow flow in one direction and close when flow stops or reverses. Body is 316 stainless steel for excellent corrosion resistance.
    316 Stainless Steel Body—Spring-Loaded Piston
    Image of ProductInUse. Shown with Union Fitting (Sold Separately). Front orientation. Contains MultipleImages. Check Valves. Union-Insert Check Valves.
    Image of Product. Front orientation. Check Valves. Union-Insert Check Valves.

    Shown with Union Fitting

    (Sold Separately)

    Flow Coefficient (Cv)—Flow coefficient (Cv) is the amount of water (in gallons per minute) at 60° F that will flow through a fully open valve with a difference of 1 psi between the inlet and the outlet.
    Check Valves
    Valve Union
    Fittings
    Pipe
    Size
    Flow Coefficient
    (Cv)
    Max. Pressure
    @ Temp.
    Min. Opening
    Pressure, psi
    Temp. Range,
    ° F
    End-to-End
    Lg.
    Mounting Position
    Specs.
    Met
    For Use With
    Piston Material
    Spring Material
    Seal Material
    Each
    Each
    NPT Female Inlet × NPT Female Outlet
    1 1/2 191,500 psi @ 70° F0.5-10 to 4001 5/16"Horizontal, VerticalASTM A479Air, Argon, Helium, Krypton, Neon, Water, Xenon316 Stainless Steel
    		316 Stainless Steel
    		Fluoroelastomer
    		8615T4200000008615T620000000
     

    Easy-Maintenance Threaded Two-Stage Backflow-Prevention Valves for Drinking Water

    Image of Product. Front orientation. Backflow-Prevention Valves. Easy-Maintenance Threaded Two-Stage Backflow-Prevention Valves for Drinking Water, Dual Check.
    Image of Product. Front orientation. Backflow-Prevention Valves. Easy-Maintenance Threaded Two-Stage Backflow-Prevention Valves for Drinking Water, Reduced Pressure Zone.

    Dual Check

    Reduced Pressure Zone

    Integral shutoff valves isolate flow for inline maintenance, and a top-entry cover provides easy access to internal components. These valves meet NSF/ANSI 61 for use with drinking water. For maximum protection from system contamination, they consist of a primary check valve and a secondary check valve. If the first check fails to close when flow stops or reverses, the secondary check valve engages to prevent backflow. A strainer prevents debris from blocking the check valves.
    Reduced Pressure Zone—Reduced-pressure-zone valves have a relief valve that discharges backflow if both check valves fail.
    Air Inlet—Valves with an air inlet provide high-capacity relief in emergency conditions. If both check valves fail, the inlet introduces air to quickly displace liquid for faster discharge through the relief valve.
    Pipe
    Size
    Max. Pressure
    @ Temp.
    Min. Opening
    Pressure, psi
    Temp. Range,
    ° F
    End-to-End
    Lg.
    Features
    Specs.
    Met
    Food Industry
    Std.
    Certification
    For Use With
    Seal
    Material
    Each
    Bronze Body—Dual Check
     
    NPT Female Inlet × NPT Female Outlet
    1 1/2
    		175 psi @ 180° F3035 to 18021 5/8"StrainerASSE 1015NSF/ANSI 61
    		CSA Certified, USC Foundation Approved
    		Drinking WaterBuna-N
    		4775K64000000000
     
    Bronze Body—Reduced Pressure Zone
     
    NPT Female Inlet × NPT Female Outlet
    1 1/2
    		175 psi @ 180° F3035 to 18022 3/4"Relief Valve, StrainerASSE 1013NSF/ANSI 61
    		USC Foundation Approved
    		Drinking WaterBuna-N
    		45265K4400000000
     
    NPT Male Inlet × NPT Male Outlet
    1 1/2
    		175 psi @ 140° F3035 to 14024 3/8"Air Inlet, Relief Valve, StrainerASSE 1013NSF/ANSI 61
    		USC Foundation Approved
    		Drinking WaterBuna-N
    		4777K8300000000
     

    Vacuum Breakers for Chemicals

    A plastic body withstands pH neutralizing, cleaning, and plating solutions containing sodium hydroxide, methyl ethyl ketone, and other harsh chemicals. Also known as vacuum-breaking valves, these valves have vents that open when pressure drops to relieve vacuum conditions and prevent backward suction from drawing liquid into upstream piping.
    Spring-Loaded Piston Check Valve
    Image of Product. Front orientation. Vacuum Breakers. Vacuum Breakers for Chemicals.
    Material
    CPVC Body
    Inlet Pipe
    Size
    Outlet
    Pipe SIze
    For Pipe
    Schedule
    Flow Coefficient
    (Cv)
    Max. Pressure
    @ Temp.
    Min. Opening
    Pressure, psi
    End-to-End
    Lg.
    Seal
    Piston
    Spring
    For Use With
    Temp. Range,
    ° F
    Color
    Each
    NPT Female Inlet × NPT Female Outlet
    1 1/2
    		1 1/2
    		80
    		Not Rated100 psi @ 75° F17 15/16"Fluoroelastomer
    		CPVC
    		PolymerBeverage, Food, Air, Ammonia, Argon, Carbon Dioxide, Chlorinated Water, Diesel Fuel, Drinking Water, Ethylene Glycol, Helium, Hydrochloric Acid, Kerosene, Krypton, Liquid Carbon Dioxide, Methanol (Methyl Alcohol), Methyl Ethyl Ketone (MEK), Mineral Spirits, Natural Gas, Neon, Nitric Acid, Nitrogen, Oil, Oxygen, Soap Solutions, Sodium Hydroxide (Caustic Soda), Sodium Hypochlorite (Bleach), Water, Xenon40 to 180Light Gray1868N180000000
     

    Pipeline Flame Arresters

    Image of Product. Front orientation. Flame Arresters. Pipeline Flame Arresters.
    To prevent flashback in flammable gas pipelines, an internal flame-arresting element absorbs the heat from a fire to extinguish the flame. These valves are commonly used in pilot lines connected to waste gas burners.
    Pipe
    Size
    Max. Pressure
    @ Temp.
    Max. Temp.,
    ° F
    End-to-End
    Lg.
    For Use With
    Flame-Arresting Element
    Material
    Each
    Aluminum Body
     
    NPT Female
    1 1/2
    		25 psi @ 176° F1763 3/4"Butane, Natural Gas, Propane316 Stainless Steel
    		4717K350000000
     

    Vacuum Breakers

    Also known as vacuum-breaking valves, these valves have vents that open when pressure drops to relieve vacuum conditions and prevent backward suction from drawing liquid into upstream piping.
    90° Elbow
    Image of Product. Front orientation. Contains Annotated. Vacuum Breakers. Vacuum Breakers, 90° Elbow.
    Elbows are designed for intermittent flow. They discharge liquid directly and should not be installed in areas where spillage could cause damage.
    Brass Body
    Inlet Pipe
    Size
    Outlet
    Pipe SIze
    Max. Pressure
    @ Temp.
    Temp. Range,
    ° F
    Port-to-Port
    Lg.
    Seal Material
    For Use
    With
    Each
    NPT Female Inlet × NPT Female Outlet
    1 1/2
    		1 1/2
    		125 psi @ 70° F35 to 1802 1/4"Silicone Rubber
    		Water47685K460000000
     
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