Gravity Check Valves | McMaster-Carr

	Pipe Size Pipe Size

1/4
3/8
1/2
3/4
1
1 1/4
1 1/2
2
2 1/2
3
4
5
6
8
10

	Connection Style Connection Style

	Socket Connect
	Flanged
	Threaded
	Barbed
	Solder Connect

	Body Material Body Material

	For Use With For Use With

	Mounting Orientation Mounting Orientation

Horizontal

Vertical

Any Position

	Check Valve Type Check Valve Type

Swing

Lift

Spring-Loaded Ball

	Valve Type Valve Type

Check

Dual Check

	Seal Material Seal Material

	Connection Type Connection Type


Pipe	Tube

	Maximum Pressure Maximum Pressure

	End-to-End Length End-to-End Length

	Minimum Opening Pressure Minimum Opening Pressure

	Disc Material Disc Material

	Connection Connection

Inlet

Outlet

	Maximum Temperature Maximum Temperature

	Minimum Temperature Minimum Temperature

-20° F

0° F

35° F

	Flow Coefficient (Cv) Flow Coefficient (Cv)

1.3
1.53
2.3
2.5
2.69
2.87
3.3
4.2
4.3
4.8
5.08
5.24
5.5
6
7
7.2
8.86
8.96
10
13
14.1
14.3
15.67
16
18
21.83
22
22.34
24
30
31
37.84
39
48
49
54
56
60
70
72
76
90
92
100
102
110
120
130
131
150
170
171
190
192
193
240
280
291
292
297
340
390
468
520
590
705
735
850
870
1,060
1,600
1,795
1,880
2,400
2,940
Not Rated

	Gender Gender

Female

Male

	Pressure Class Pressure Class

	Fitting Type Fitting Type

Connector

Insert

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

RoHS Compliant

RoHS Compliant with
Exemptions

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

REACH Compliant

View catalog pages (7)

Forward

How can we improve?

171 Products

About Backflow-Prevention Valves

Plastic Socket-Connect Check Valves

Also known as backwater valves, these valves prevent backflow of sewage and wastewater in drain, waste, and vent systems.

Socket-Connect Check Valves

Weld to unthreaded metal pipe.

Flanged Check Valves

Bolt to ANSI flanges.

High-Flow Threaded Check Valves

To achieve the maximum possible flow, internal components are designed to reduce flow resistance.

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.

Flange-Mount Check Valves

Sandwich these valves between two ANSI flanges for backflow prevention at a fraction of the weight of flanged check valves and a reduced pipeline footprint.