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	Threaded

Barbed	Flanged

Solder Connect

	Body Material Body Material

	For Use With For Use With

	Check Valve Type Check Valve Type

	Mounting Orientation Mounting Orientation

Horizontal

Vertical

Any Position

	Valve Type Valve Type

Check

Dual Check

	Seal Material Seal Material

	Connection Type Connection Type


Pipe	Tube

	Minimum Opening Pressure Minimum Opening Pressure

	Maximum Pressure Maximum Pressure

	Maximum Temperature Maximum Temperature

	Minimum Temperature Minimum Temperature

-20° F

0° F

35° F

	Gender Gender

Female

Male

	Flow Coefficient (Cv) Flow Coefficient (Cv)

1.3
1.53
2.3
2.5
2.69
2.87
3.2
3.3
4.2
4.3
4.8
5.08
5.24
5.5
6
6.7
7
7.2
8.86
8.96
10
11.9
13
14.1
14.3
15.67
16
18
21
21.83
22
22.34
24
30
30.8
31
37.84
39
48
49
54
56
60
70
72
76
77
90
92
100
102
110
119
120
130
131
150
168
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

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

	Disc Material Disc Material

	Connection Connection

Inlet

Outlet

	Fitting Type Fitting Type

Connector

Insert

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

DFARS Specialty Metals
COTS-Exempt

	Specifications Met Specifications Met

	Color Color

	White
	Clear
	Dark Gray

	For Tube ID For Tube ID

183 Products

About Backflow-Prevention Valves

Check Valves

Two-Stage Backflow-Prevention Valves