Table of Pipe Sizing

CONVERSIONS Gallons per minute (Liters per second) to Fixture units.
Reference : FUNDAMENTALS of PLUMBING DESIGN VOL. 1

COLD WATER
4 - 6 Friction loss
10 - 15 Friction loss
FLOW
FIXTURE
UNITS
PIPE
DIAMETER
PIPE DIAMETER
REF
No.
GPM
FLUSH
FLUSH
INCH
MM
INCH
MM
(L/s)
TANK
VALVE
1
1(0.06)
0
1/2
15
3/8
10
2
2(0.13)
1
1/2
15
1/2
15
3
3(0.19)
3
3/4
20
1/2
15
4
4(0.25)
4
3/4
20
3/4
20
5
5(0.32)
6
1
25
3/4
20
6
6(0.38)
7
1
25
3/4
20
7
7(0.44)
8
1
25
3/4
20
8
8(0.50)
10
1
25
3/4
20
9
9(0.57)
12
1 1/4
32
1
25
10
10(0.63)
13
1 1/4
32
1
25
11
11(0.69)
15
1 1/4
32
1
25
12
12(0.76)
16
1 1/4
32
1
25
13
13(0.82)
18
1 1/4
32
1
25
14
14(0.88)
20
1 1/4
32
1
25
15
15(0.95)
21
1 1/2
40
1
25
16
16(1.01)
23
1 1/2
40
1
25
17
17(0.07)
24
1 1/2
40
1 1/4
32
18
18(1.13)
26
1 1/2
40
1 1/4
32
19
19(1.20)
28
1 1/2
40
1 1/4
32
20
20(1.26)
30
1 1/2
40
1 1/4
32
21
21(1.32)
32
1 1/2
40
1 1/4
32
22
22(1.39)
34
5
1 1/2
40
1 1/4
32
23
23(1.45)
36
6
1 1/2
40
1 1/4
32
24
24(1.45)
39
7
1 1/2
40
1 1/4
32
25
25(1.58)
42
8
1 1/2
40
1 1/4
32
26
26(1.64)
44
9
2
50
1 1/2
40
27
27(1.70)
46
10
2
50
1 1/2
40
28
28(1.76)
49
11
2
50
1 1/2
40
29
29(1.83)
51
12
2
50
1 1/2
40
30
30(1.89)
54
13
2
50
1 1/2
40
31
31(1.95)
56
14
2
50
1 1/2
40
32
32(2.02)
58
15
2
50
1 1/2
40
33
33(2.06)
60
16
2
50
1 1/2
40
34
34(2.14)
63
18
2
50
1 1/2
40
35
35(2.21)
66
20
2
50
1 1/2
40
36
36(2.27)
69
21
2
50
1 1/2
40
37
37(2.33)
74
23
2
50
1 1/2
40
38
38(2.39)
78
25
2
50
1 1/2
40
39
39(2.46)
83
26
2
50
1 1/2
40
40
40(2.52)
86
28
2
50
1 1/2
40
41
41(2.58)
90
30
2
50
2
50
42
42(2.65)
93
31
2
50
2
50
43
43(2.71)
99
33
2
50
2
50
44
44(2.77)
103
35
2
50
2
50
45
45(2.84
107
37
2
50
2
50
46
46(2.90)
111
39
2 1/2
65
2
50
47
47(2.96)
115
42
2 1/2
65
2
50
48
48(3.02)
119
44
2 1/2
65
2
50
49
49(3.09)
123
46
2 1/2
65
2
50
HOT WATER
10 - 15 Friction loss
PIPE DIAMETER
INCH
MM
3/8
1/2
1/2
1/2
3/4
3/4
3/4
3/4
3/4
1
1
1
1
1
1
1 1/4
1 1/4
1 1/4
1 1/4
1 1/4
1 1/4
1 1/4
1 1/4
1 1/4
1 1/4
1 1/4
1 1/4
1 1/4
1 1/4
1 1/4
1 1/4
1 1/4
1 1/4
1 1/4
1 1/4
1 1/4
1 1/4
1 1/4
1 1/4
1 1/4
1 1/2
1 1/2
1 1/2
1 1/2
1 1/2
1 1/2
1 1/2
1 1/2
1 1/2
10
15
15
15
20
20
20
20
20
25
25
25
25
25
25
32
32
32
32
32
32
32
32
32
32
32
32
32
32
32
32
32
32
32
32
32
32
32
32
32
40
40
40
40
40
40
40
40
40
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
50(3.15)
51(3.21)
52(3.28)
53(3.34)
54(3.40)
55(3.47)
56(3.53)
57(3.59)
58(3.65)
59(3.72)
60(3.78)
62(3.91)
64(4.03)
66(4.16)
68(4.28)
70(4.41)
72(4.54)
74(4.66)
76(4.79)
78(4.91)
80(5.04)
82(5.17)
84(5.29)
86(5.42)
88(5.54)
90(5.67)
92(5.80)
94(5.92)
96(6.05)
98(6.17)
100(6.30)
105(6.62)
110(6.93)
115(7.25)
120(7.76)
125(7.88)
130(8.19)
135(8.51)
140(8.82)
145(9.14)
150(9.45)
155(9.77)
160(10.08)
165(10.40)
170(10.70)
175(11.03)
180(11.34)
185(11.66)
190(11.97)
200(12.60)
210(13.32)
220(13.86)
230(13.49)
240(15.12)
250(15.75)
260(16.38)
127
130
135
141
146
151
155
160
165
170
175
185
195
205
215
225
236
245
254
264
275
284
294
305
315
326
337
348
359
370
380
406
431
455
479
506
533
559
585
611
638
665
692
719
748
778
809
840
874
945
1048
1091
1173
1254
1335
1418
48
50
52
54
57
60
63
66
69
73
76
82
88
95
102
108
116
124
132
140
148
158
168
176
186
195
205
214
223
234
245
270
295
329
365
396
430
460
490
521
559
596
631
666
700
739
775
811
850
931
1009
1091
1173
1254
1335
1418
2 1/2
2 1/2
2 1/2
2 1/2
2 1/2
2 1/2
2 1/2
2 1/2
2 1/2
2 1/2
2 1/2
2 1/2
2 1/2
2 1/2
2 1/2
2 1/2
2 1/2
2 1/2
2 1/2
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
65
65
65
65
65
65
65
65
65
65
65
65
65
65
65
65
65
65
65
75
75
75
75
75
75
75
75
75
75
75
75
75
75
75
75
75
75
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2 1/2
2 1/2
2 1/2
2 1/2
2 1/2
2 1/2
2 1/2
2 1/2
2 1/2
2 1/2
2 1/2
2 1/2
2 1/2
2 1/2
2 1/2
2 1/2
2 1/2
2 1/2
2 1/2
2 1/2
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
50
50
50
50
50
50
50
50
50
50
50
50
50
50
50
50
50
50
50
50
50
65
65
65
65
65
65
65
65
65
65
65
65
65
65
65
65
65
65
65
65
75
75
75
75
75
75
75
75
75
75
75
75
75
75
75
1 1/2
1 1/2
1 1/2
1 1/2
1 1/2
1 1/2
1 1/2
1 1/2
1 1/2
1 1/2
1 1/2
1 1/2
1 1/2
1 1/2
1 1/2
1 1/2
1 1/2
1 1/2
1 1/2
1 1/2
1 1/2
1 1/2
1 1/2
1 1/2
2 1/2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
40
40
40
40
40
40
40
40
40
40
40
40
40
40
40
40
40
40
40
40
40
40
40
40
65
50
50
50
50
50
50
50
50
50
50
50
50
50
50
50
50
50
50
50
50
50
50
50
50
50
50
50
50
50
50
50
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
270(17.01)
280(17.64)
290(18.27)
300(18.90)
310(19.50)
320(20.16)
330(20.79)
340(21.42)
350(22.05)
360(22.68)
370(23.31)
380(23.94)
390(24.57)
400(25.20)
410(25.83)
420(26.46)
430(27.09)
440(27.72)
450(28.35)
500(31.50)
550(34.65)
600(37.80)
700(44.10)
800(50.40)
900(56.70)
1000(63.00)
1500
1583
1668
1755
1845
1926
2018
2110
2204
2298
2388
2480
2575
2670
2765
2862
2960
3060
3150
3620
4070
4480
5380
6280
7280
8300
1500
1583
1668
1755
1845
1926
2018
2110
2204
2298
2388
2480
2575
2670
2765
2862
2960
3060
3150
3620
4070
4480
5380
6280
7280
8300
4
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
6
6
6
6
6
8
8
100
125
125
125
125
125
125
125
125
125
125
125
125
125
125
125
125
125
125
150
150
150
150
150
200
200
3
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
4
5
5
5
5
5
75
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
125
125
125
125
125
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2 1/2
2 1/2
2 1/2
2 1/2
3
50
50
50
50
50
50
50
50
50
50
50
50
50
50
50
50
50
50
50
50
50
65
65
65
65
75
Horizontal
Sewer Pipe
Pipe Diameter
MM
Vertical
Sewer Pipe
Pipe Diameter
MM
Ventilating
Pipe
Pipe Diameter
MM
50
50
50
50
50
50
50
75
75
75
75
75
75
75
75
75
75
75
75
75
75
75
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
50
50
50
50
50
50
50
50
50
50
50
50
75
75
75
75
75
75
75
75
75
75
75
75
75
75
75
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
50
50
50
50
50
50
50
50
50
50
50
50
50
50
50
50
50
50
75
75
75
75
75
75
75
75
75
75
75
75
75
75
75
75
75
75
75
75
75
75
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
200
200
200
200
200
200
200
200
200
200
200
200
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
200
100
100
100
100
100
100
100
100
100
100
100
100
100
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
150
200
200
200
200
200
200
200
200
200
200
200
200
200
250
250
250
250
250
250
250
250
300
300
300
300
300
200
200
200
200
200
200
200
200
200
200
200
200
200
200
200
200
200
200
200
200
250
250
250
300
300
300
200
200
200
200
200
200
200
200
200
200
200
200
200
200
200
200
200
200
200
200
200
200
200
200
200
200

Table of Pipe Sizing

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What units are used to measure flow rates?

CONVERSIONS Gallons per minute (Liters per second) to Fixture units.

Reference : FUNDAMENTALS of PLUMBING DESIGN VOL. 1

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