Valves for Water | McMaster-Carr

0.01
0.013
0.02
0.03
0.038
0.04
0.05
0.06
0.07
0.08
0.081
0.09
0.095
0.1
0.11
0.12
0.15
0.156
0.17
0.18
0.19
0.2
0.21
0.22
0.23
0.24
0.25
0.28
0.29
0.292
0.3
0.31
0.35
0.37
0.38
0.4
0.42
0.43
0.44
0.45
0.47
0.5
0.51
0.52
0.53
0.54
0.55
0.58
0.6
0.63
0.64
0.65
0.68
0.7
0.72
0.73
0.75
0.76
0.77
0.78
0.79
0.8
0.82
0.83
0.85
0.87
0.88
0.9
0.92
0.93
0.94
1
1.02
1.03
1.1
1.15
1.2
1.21
1.24
1.3
1.31
1.4
1.43
1.47
1.5
1.52
1.57
1.6
1.68
1.7
1.75
1.84
1.85
1.9
1.93
1.954
2
2.09
2.1
2.2
2.3
2.4
2.5
2.6
2.61
2.64
2.67
2.7
2.74
2.75
2.8
2.87
2.9
3
3.03
3.1
3.2
3.26
3.29
3.3
3.4
3.47
3.48
3.5
3.53
3.584
3.6
3.8
3.9
4
4.08
4.2
4.3
4.4
4.48
4.5
4.6
4.7
4.78
4.8
5
5.02
5.1
5.2
5.24
5.3
5.4
5.5
5.6
5.7
5.75
5.8
5.9
6
6.01
6.03
6.1
6.3
6.32
6.463
6.5
6.56
6.6
6.7
6.8
6.85
6.9
7
7.05
7.2
7.3
7.4
7.5
7.7
7.8
8
8.1
8.2
8.26
8.3
8.4
8.61
8.8
8.86
9
9.088
9.1
9.15
9.2
9.3
9.49
9.5
9.51
9.6
9.7
9.8
10
10.3
10.4
10.57
10.7
11
11.1
11.2
11.6
11.9
12
12.1
12.2
12.4
12.5
12.6
12.7
12.83
12.9
13
13.95
14
14.24
14.3
15
15.1
15.4
15.5
15.67
15.85
16
16.3
16.44
16.5
16.8
17
17.4
17.6
18
18.6
18.8
19
19.3
19.72
19.9
20
20.6
21
21.5
21.83
22
22.1
23
24
24.8
25
26
27
27.67
28
29
29.71
29.75
30
30.5
30.69
30.8
31
32
32.3
33
33.3
34
34.4
34.8
35
36
37
37.84
38
38.5
38.6
39
40
42.5
43
43.02
43.76
43.81
44
45
46
47
48
48.5
48.58
49
50
50.1
51
52
52.2
53
54
56
57
58
59
60
61
62.1
63
64
65
65.2
66
68
69
70
71
72
74
74.6
75
76
77
80
80.9
81
82
84
85
89
90
91
92
92.4
93
94
95
97
100
102
103.7
105
108
109
110
111
112
112.5
115
119
120
125
129
130
131
132
133.4
135
137
138
140
141
142
144
144.4
146
149
150
156
159
160
163
165
168
170
174
175
177
180
185
190
191
192
193
195
200
201.3
202.7
206.8
211
215
220
227
228
230
240
241
248
249
250
255.2
257
260
266
268.4
270
277
280
284
285
287
288
290
292
297
300
307
309.2
313.2
319
333
335
337
340
345
348.6
350
357
360
370
376
386
389
390
395
400
402
411
412
413
420
451
457
468
469
480
490
495
500
503
504.6
510
520
536
540
563.8
580
590
596.2
599
600
605
629
631.4
670
706
720
735
740
750
820
835
850
860
880
896.5
930
945
1,009.5
1,013
1,018
1,020
1,060
1,125
1,150
1,245
1,305.5
1,309
1,366
1,400
1,577.3
1,600
1,620
1,622
1,660
1,780
1,800
1,880
1,900
2,020
2,110
2,150
2,250
2,400
2,500
2,901
2,940
3,104
5,470
7,942
Not Rated

	For Tube OD For Tube OD

1/32"-1/2"

1/16"

3/32"-1/4"

3/32"-1/2"

3/32"-5/8"

3/32"-3/4"

3/32"-7/8"

5/32"-1/4"

5/16"-3/8"

3/8"-1 5/16"

7/16"-1/2"

0.8-8mm

0.8-12mm

	Fitting Type Fitting Type

	Vacuum Rating Vacuum Rating

Forward

How can we improve?

4,518 Products

Flow Control

On/Off Valves

Turn flow on and off.

Flow-Adjustment Valves

Gradually open and close these valves to adjust and regulate flow.

Diverting Valves

Divert flow between multiple ports.

Backflow-Prevention Valves

Stop backward flow to prevent system contamination.

Balancing Valves

These balancing valves help you measure the difference in pressure across the valve and adjust the flow rate to system components. Also known as circuit setters, they’re often used in systems that need an even distribution of flow, such as HVAC systems.

Flow-Control Orifices

Also known as flow restrictors and precision orifice valves, these are used to throttle, vent, bleed, or regulate the flow of liquid and gas.

Other Valves

Drainage Valves

Also known as stop cocks, install these valves on your tank for easy draining.

Float Valves for Water and Oil

Control liquid levels in processing tanks and cooling towers.

Float Valve Bodies

Combine these float valve bodies with floats and rods to create float valves that meet exact specifications.

Backflow-Prevention Valves
with Clamps for Sump Pumps

Prevent dirty water from flowing back to your pump.

Pressure and Vacuum Control Valves

Ensure safe, consistent, and efficient pressure in pipelines and tanks. These valves are available in relief, pop-safety, pressure-regulating, and air-release styles.