Socket Connect Check Valves

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80 Products

About Backflow-Prevention Valves

For Use With: Argon, Helium, Krypton, Neon, Steam, Water, Xenon
Disc Material: 316 Stainless Steel
Seal Material: PTFE Plastic

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.

For technical drawings and 3-D models, click on a part number.

316 Stainless Steel Body
Pipe Size	Flow Coefficient (Cv)	Pressure Class	Max. Pressure	Max. Steam Pressure	Min. Opening Pressure, psi	Temperature Range, °F	End-to-End Lg.	Features		Each
Socket Connect × Socket Connect
1/4	4.2	200	200 psi @ 70° F	150 psi @ 350° F	0.5	-20° to 400°	2 9/16"	Removable Cap	0000000	000000
3/8	5.5	200	200 psi @ 70° F	150 psi @ 350° F	0.5	-20° to 400°	2 9/16"	Removable Cap	0000000	00000
1/2	7	200	200 psi @ 70° F	150 psi @ 350° F	0.5	-20° to 400°	2 9/16"	Removable Cap	0000000	00000
3/4	16	200	200 psi @ 70° F	150 psi @ 350° F	0.5	-20° to 400°	2 15/16"	Removable Cap	0000000	00000
1	30	200	200 psi @ 70° F	150 psi @ 350° F	0.5	-20° to 400°	3 9/16"	Removable Cap	0000000	000000
1 1/4	49	200	200 psi @ 70° F	150 psi @ 350° F	0.5	-20° to 400°	4 1/8"	Removable Cap	0000000	000000
1 1/2	72	200	200 psi @ 70° F	150 psi @ 350° F	0.5	-20° to 400°	4 11/16"	Removable Cap	0000000	000000
2	130	200	200 psi @ 70° F	150 psi @ 350° F	0.5	-20° to 400°	5 7/16"	Removable Cap	0000000	000000
2 1/2	280	200	200 psi @ 70° F	150 psi @ 350° F	0.5	-20° to 400°	6 1/8"	Removable Cap	0000000	000000
3	390	200	200 psi @ 70° F	150 psi @ 350° F	0.5	-20° to 400°	7 5/16"	Removable Cap	0000000	000000

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.

For technical drawings and 3-D models, click on a part number.

PVC Plastic Body—Swing Valve

Swing Valve

Replacement Flapper

For Use With: Water
Pressure Class : Not Rated
Disc Material: PVC Plastic
Seal Material: PVC Plastic

Valves											Replacement Flappers
Pipe Size	For Pipe Schedule	Max. Pressure	Min. Opening Pressure, psi	Temperature Range, °F	Color	End-to-End Lg.	Mounting Orientation	Features		Each		Each
Socket Connect × Socket Connect
1 1/2	40	60 psi @ 140° F	0	35° to 140°	White	4 3/16"	Horizontal	Removable Cap	0000000	000000	0000000	000000
2	40	60 psi @ 140° F	0	35° to 140°	White	4 1/2"	Horizontal	Removable Cap	0000000	00000	0000000	00000
3	40	60 psi @ 140° F	0	35° to 140°	White	7 5/16"	Horizontal	Removable Cap	0000000	00000	0000000	0000
4	40	60 psi @ 140° F	0	35° to 140°	White	9 3/4"	Horizontal	Removable Cap	0000000	00000	0000000	00000
6	40	60 psi @ 140° F	0	35° to 140°	White	15 3/16"	Horizontal	Removable Cap	0000000	000000	0000000	00000

Clear-View Socket-Connect Check Valves

For Use With: Air, Water
Piston Material: PVC Plastic
Seal Material: EPDM Rubber

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.

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.

For technical drawings and 3-D models, click on a part number.

PVC Plastic Body
Pipe Size	For Pipe Schedule	Flow Coefficient (Cv)	Max. Pressure	Min. Opening Pressure, psi	Temperature Range, °F	Color	End-to-End Lg.	Features		Each
Socket Connect × Socket Connect
1/2	40, 80	6.7	150 psi @ 70° F	0.29	35° to 140°	Clear	5 5/8"	Removable Cap	0000000	000000
3/4	40, 80	11.9	150 psi @ 70° F	0.29	35° to 140°	Clear	6 5/16"	Removable Cap	0000000	00000
1	40, 80	21	150 psi @ 70° F	0.29	35° to 140°	Clear	6 7/8"	Removable Cap	0000000	00000
1 1/2	40, 80	49	150 psi @ 70° F	0.29	35° to 140°	Clear	8 1/8"	Removable Cap	0000000	000000
2	40, 80	77	150 psi @ 70° F	0.29	35° to 140°	Clear	8 7/8"	Removable Cap	0000000	000000
3	40, 80	168	150 psi @ 70° F	0.29	35° to 140°	Clear	12 1/4"	Removable Cap	0000000	000000

Check Valves with Solder-Connect Fittings

For Use With: Steam, Water
Disc Material: Bronze
Seal Material: Bronze

Solder these valves to copper tubing for a permanent, leak-tight connection. 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.

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.

For technical drawings and 3-D models, click on a part number.

Bronze Body
For Copper Tube Size	For Tube OD	Flow Coefficient (Cv)	Pressure Class	Max. Pressure	Max. Steam Pressure	Min. Opening Pressure, psi	Temperature Range, °F	End-to-End Lg.	Features		Each
Solder Connect × Solder Connect
1/4	3/8"	1.3	125	200 psi @ 70° F	125 psi @ 350° F	0.5	-20° to 405°	2 1/16"	Removable Cap	0000000	000000
3/8	1/2"	2.5	125	200 psi @ 70° F	125 psi @ 350° F	0.5	-20° to 405°	2 1/16"	Removable Cap	0000000	00000
1/2	5/8"	4.8	125	200 psi @ 70° F	125 psi @ 350° F	0.5	-20° to 405°	2 9/16"	Removable Cap	0000000	00000
3/4	7/8"	14.3	125	200 psi @ 70° F	125 psi @ 350° F	0.5	-20° to 405°	3 3/8"	Removable Cap	0000000	000000
1	1 1/8"	24	125	200 psi @ 70° F	125 psi @ 350° F	0.5	-20° to 405°	4 1/16"	Removable Cap	0000000	000000
1 1/2	1 5/8"	60	125	200 psi @ 70° F	125 psi @ 350° F	0.5	-20° to 405°	5 1/4"	Removable Cap	0000000	000000
2	2 1/8"	102	125	200 psi @ 70° F	125 psi @ 350° F	0.5	-20° to 405°	6 3/8"	Removable Cap	0000000	000000

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.

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.

For technical drawings and 3-D models, click on a part number.

PVC Plastic Body

For Use With: Citric Acid, Deionized Water, Diesel Fuel, Ethylene Glycol, Hydrochloric Acid, Isopropyl Alcohol, Kerosene, Mineral Spirits, Nitric Acid, Oil, Phosphoric Acid, Salt Water, Sodium Hypochlorite, Water
Piston Material: PVC Plastic
Spring Material: PVC Plastic
Seal Material: Fluoroelastomer Rubber

Socket Connect × Socket Connect
Pipe Size	For Pipe Schedule	Flow Coefficient (Cv)	Max. Pressure	Min. Opening Pressure, psi	Temperature Range, °F	Color	End-to-End Lg.		Each
1/2	40, 80	0.8	150 psi @ 70° F	2	40° to 140°	Dark Gray	3 3/8"	000000	0000000
3/4	40, 80	3	150 psi @ 70° F	2	40° to 140°	Dark Gray	4 3/16"	000000	000000
1	40, 80	9	150 psi @ 70° F	2	40° to 140°	Dark Gray	5 3/16"	000000	000000
1 1/4	40, 80	26	150 psi @ 70° F	2	40° to 140°	Dark Gray	6 5/8"	000000	000000
1 1/2	40, 80	45	150 psi @ 70° F	2	40° to 140°	Dark Gray	6 5/8"	000000	000000
2	40, 80	65	150 psi @ 70° F	2	40° to 140°	Dark Gray	7 5/8"	000000	000000

CPVC Plastic Body

For Use With: Citric Acid, Deionized Water, Diesel Fuel, Hydrochloric Acid, Isopropyl Alcohol, Kerosene, Mineral Spirits, Nitric Acid, Oil, Phosphoric Acid, Salt Water, Sodium Hypochlorite, Water
Piston Material: CPVC Plastic
Spring Material: CPVC Plastic
Seal Material: Fluoroelastomer Rubber

Socket Connect × Socket Connect
Pipe Size	For Pipe Schedule	Flow Coefficient (Cv)	Max. Pressure	Min. Opening Pressure, psi	Temperature Range, °F	Color	End-to-End Lg.		Each
1/2	40, 80	0.8	150 psi @ 70° F	2	40° to 190°	Light Gray	3 3/8"	0000000	0000000
3/4	40, 80	3	150 psi @ 70° F	2	40° to 190°	Light Gray	4 3/16"	0000000	000000
1	40, 80	9	150 psi @ 70° F	2	40° to 190°	Light Gray	5 3/16"	0000000	000000
1 1/2	40, 80	45	150 psi @ 70° F	2	40° to 190°	Light Gray	6 5/8"	0000000	000000
2	40, 80	65	150 psi @ 70° F	2	40° to 190°	Light Gray	7 5/8"	0000000	000000

Clear-View Socket-Connect Check Valves for Harsh Chemicals

For Use With: Carbon Dioxide, Citric Acid, Deionized Water, Diesel Fuel, Hydrochloric Acid, Methanol, Nitric Acid, Phosphoric Acid, Salt Water, Sulfuric Acid, Water
Piston Material: PVC Plastic
Seal Material: Fluoroelastomer Rubber

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. Valves have a PVC body and a fluoroelastomer seal for excellent chemical resistance. 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.

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.

For technical drawings and 3-D models, click on a part number.

PVC Plastic Body
Pipe Size	For Pipe Schedule	Flow Coefficient (Cv)	Max. Pressure	Min. Opening Pressure, psi	Temperature Range, °F	Color	End-to-End Lg.	Features		Each
Socket Connect × Socket Connect
1/2	40, 80	6.7	150 psi @ 70° F	0.29	35° to 140°	Clear	5 5/8"	Removable Cap	0000000	000000
3/4	40, 80	11.9	150 psi @ 70° F	0.29	35° to 140°	Clear	6 5/16"	Removable Cap	0000000	00000
1	40, 80	21	150 psi @ 70° F	0.29	35° to 140°	Clear	6 7/8"	Removable Cap	0000000	000000

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.

Spring-loaded piston check valves reduce slamming and vibration in quick shut-off applications.

Swing check valves create less flow resistance than spring-loaded piston check valves.

Clear valves let you visually inspect flow and debris accumulation.

For technical drawings and 3-D models, click on a part number.

PVC Plastic Body—Spring-Loaded Piston

For Use With: Drinking Water
Piston Material: PVC Plastic
Spring Material: 302 Stainless Steel
Seal Material: EPDM Rubber

						White
Pipe Size	For Pipe Schedule	Max. Pressure	Min. Opening Pressure, psi	Temperature Range, °F	End-to-End Lg.		Each
Socket Connect × Socket Connect
1/2	40	150 psi @ 70° F	0.5	35° to 140°	4 1/8"	00000000	000000
3/4	40	150 psi @ 70° F	0.5	35° to 140°	4 1/8"	00000000	00000
1	40	150 psi @ 70° F	0.5	35° to 140°	5 1/4"	00000000	00000
1 1/4	40	150 psi @ 70° F	0.5	35° to 140°	6 3/16"	00000000	00000
1 1/2	40	150 psi @ 70° F	0.5	35° to 140°	6 3/16"	00000000	00000
2	40	150 psi @ 70° F	0.5	35° to 140°	7"	00000000	00000

PVC Plastic Body—Swing

Disc Material: EPDM Rubber
Seal Material: EPDM Rubber
For Use With: Drinking Water

White
Pipe Size	For Pipe Schedule	Max. Pressure	Min. Opening Pressure, psi	Temperature Range, °F	End-to-End Lg.		Each
Socket Connect × Socket Connect
1/2	40	150 psi @ 70° F	0.5	35° to 140°	3 1/2"	00000000	000000
3/4	40	150 psi @ 70° F	0.5	35° to 140°	3 1/2"	00000000	00000
1	40	150 psi @ 70° F	0.5	35° to 140°	5 1/8"	00000000	00000
1 1/4	40	150 psi @ 70° F	0.5	35° to 140°	5 1/4"	00000000	00000
1 1/2	40	150 psi @ 70° F	0.5	35° to 140°	5 3/8"	00000000	00000
2	40	150 psi @ 70° F	0.5	35° to 140°	6"	00000000	00000
Clear
Socket Connect × Socket Connect
1/2	40	150 psi @ 70° F	0.5	35° to 140°	3 1/2"	0000000	00000
3/4	40	150 psi @ 70° F	0.5	35° to 140°	3 1/2"	0000000	00000
1	40	150 psi @ 70° F	0.5	35° to 140°	5 1/8"	0000000	00000
1 1/4	40	150 psi @ 70° F	0.5	35° to 140°	5 1/4"	0000000	00000
1 1/2	40	150 psi @ 70° F	0.5	35° to 140°	5 3/8"	0000000	00000
2	40	150 psi @ 70° F	0.5	35° to 140°	6"	0000000	00000

Check Valves with Solder-Connect Fittings for Drinking Water

For Use With: Drinking Water
Piston Material: Polyetherimide Plastic
Spring Material: 302 Stainless Steel
Seal Material: Buna-N Rubber

Solder these valves to copper tubing for a permanent, leak-tight connection. They meet NSF/ANSI 61 for use in drinking water lines. All open to allow flow in one direction and close when flow stops or reverses.

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.

For technical drawings and 3-D models, click on a part number.

Brass Body
For Tube OD	Flow Coefficient (Cv)	Max. Pressure	Min. Opening Pressure, psi	Temperature Range, °F	End-to-End Lg.	Specifications Met		Each
Solder Connect × Solder Connect
1/2"	9.36	400 psi @ 180° F	0.5	10° to 210°	3 7/16"	ASME B16.18, NSF/ANSI 61	000000	000000
3/4"	16.3	400 psi @ 180° F	0.5	10° to 210°	4 3/16"	ASME B16.18, NSF/ANSI 61	000000	00000
1"	24.16	400 psi @ 180° F	0.5	10° to 210°	4 7/8"	ASME B16.18, NSF/ANSI 61	000000	00000
1 1/2"	51.9	400 psi @ 180° F	0.5	10° to 210°	5 13/16"	ASME B16.18, NSF/ANSI 61	000000	000000

Socket-Connect Check Valves for Oil and Fuel

Insert unthreaded pipe into the socket ends and weld to create a permanent, leak-tight connection. 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. A removable cap provides easy access to internal components for maintenance.

Spring-loaded ball check valves resist sticking and clogging better than spring-loaded piston check valves.

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.

For technical drawings and 3-D models, click on a part number.

Steel Body—Spring-Loaded Piston

For Use With: Diesel Fuel, Gasoline, Natural Gas, Oil
Piston Material: 420 Stainless Steel
Spring Material: 304 Stainless Steel
Seal Material: 304 Stainless Steel, Graphite

Socket Connect × Socket Connect
Pipe Size	Flow Coefficient (Cv)	Pressure Class	Max. Pressure	Min. Opening Pressure, psi	Temperature Range, °F	End-to-End Lg.	Features		Each
3/4	2.69	800	1,975 psi @ 100° F	34	-20° to 800°	3 5/8"	Removable Cap	0000000	0000000
1	5.08	800	1,975 psi @ 100° F	45	-20° to 800°	4 3/8"	Removable Cap	0000000	000000
2	22.34	800	1,975 psi @ 100° F	80	-20° to 800°	6 13/16"	Removable Cap	0000000	000000

Steel Body—Spring-Loaded Ball

For Use With: Diesel Fuel, Natural Gas
Ball Material: 304 Stainless Steel
Spring Material: 304 Stainless Steel
Seal Material: 304 Stainless Steel, Graphite

Socket Connect × Socket Connect
Pipe Size	Flow Coefficient (Cv)	Pressure Class	Max. Pressure	Min. Opening Pressure, psi	Temperature Range, °F	End-to-End Lg.	Features		Each
3/4	2.69	800	1,975 psi @ 100° F	57	-20° to 800°	3 5/8"	Removable Cap	0000000	0000000
1	5.08	800	1,975 psi @ 100° F	107	-20° to 800°	4 3/8"	Removable Cap	0000000	000000
2	22.34	800	1,975 psi @ 100° F	527	-20° to 800°	6 13/16"	Removable Cap	0000000	000000

Check Valves for Refrigerant

Spring Material: Stainless Steel
Seal Material: Neoprene Rubber
Ball Material: Stainless Steel
For Use With: Refrigerant

Use these valves in refrigeration and air-conditioning systems. All open to allow flow in one direction and close when flow stops or reverses. They solder to copper tubing for a permanent, leak-tight connection.

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.

For technical drawings and 3-D models, click on a part number.

Copper Body
For Copper Tube Size	For Tube OD	Flow Coefficient (Cv)	Max. Pressure	Min. Opening Pressure, psi	Temperature Range, °F	End-to-End Lg.		Each
Solder Connect × Solder Connect
1/4	3/8"	1.2	755 psi @ 300° F	1	-40° to 300°	3 3/4"	0000000	000000
3/8	1/2"	2.2	755 psi @ 300° F	1	-40° to 300°	3 3/4"	0000000	00000
3/4	7/8"	7.5	755 psi @ 300° F	1	-40° to 300°	4 1/2"	0000000	00000
1	1 1/8"	12.4	755 psi @ 300° F	1	-40° to 300°	5"	0000000	000000

Two-Stage Backflow-Prevention Valves with Solder-Connect Fittings

For Use With: Air, Water
Disc Material: EPDM Rubber
Seal Material: EPDM Rubber

Solder these valves to copper tubing for a permanent, leak-tight connection. They have two integral check valves with a vent between them for maximum protection from system contamination. If the primary check valve fails to close when flow stops or reverses, overflow is discharged through the threaded vent and the secondary check valve prevents backflow. Attach the vent to drain pipes to prevent spillage. These valves are designed for applications with continuous flow and are commonly used on water supply lines to boilers, processing tanks, and other equipment. All have an integral strainer to prevent debris from blocking the check valves.

For technical drawings and 3-D models, click on a part number.

							Vent Port
For Copper Tube Size	For Tube OD	Max. Pressure	Min. Opening Pressure, psi	Temperature Range, °F	End-to-End Lg.	Vent Type	Gender	Pipe Size	Thread Type	Features		Each
Brass Body
Solder Connect × Solder Connect
1/2	5/8"	175 psi @ 250° F	25	35° to 250°	4 3/8"	Threaded	Female	1/2	NPT	Strainer	0000000	0000000
3/4	7/8"	175 psi @ 250° F	25	35° to 250°	4 13/16"	Threaded	Female	1/2	NPT	Strainer	0000000	000000