Navien Gas Water Heater Installation
23
█
Gas Pipe Sizing Chart:
Maximum Natural Gas Delivery Capacity
in Cubic Feet (ft
3
) per Hour (0.60 Specific Gravity, 0.5" WC Pressure Drop)
Pipe
Size
Length in Feet
10'
20'
30'
40'
50'
60'
70'
80'
90'
100'
125'
3/4"
363
249
200
171
152
138
127
118
111
104
93
1"
684
470
377
323
286
259
239
222
208
197
174
1 1/4"
1,404
965
775
663
588
532
490
456
428
404
358
1 1/2"
2,103
1,445
1,161
993
880
798
734
683
641
605
536
2"
4,050
2,784
2,235
1,913
1,696
1,536
1,413
1,315
1,234
1,165
1,033
2 1/2"
6,455
4,437
3,563
3,049
2,703
2,449
2,253
2,096
1,966
1,857
1,646
3"
11,412
7,843
6,299
5,391
4,778
4,329
3,983
3,705
3,476
3,284
2,910
3 1/2"
16,709
11,484
9,222
7,893
6,995
6,338
5,831
5,425
5,090
4,808
4,261
4"
23,277
15,998
12,847
10,995
9,745
8,830
8,123
7,557
7,091
6,698
5,936
Contact your gas supplier for BTU/ft
3
rating. Use 1000 BTU/ft
3
for simplied calculation.
Maximum Liquefied Propane Delivery Capacity
in Thousands of BTU/Hour (0.5" WC Pressure Drop)
Pipe
Size
Length in Feet
10'
20'
30'
40'
50'
60'
70'
80'
90'
100'
125'
150'
200'
3/4"
567
393
315
267
237
217
196
185
173
162
146
132
112
1"
1,071 732
377
323
286
259
239
222
208
197
174
252
213
1 1/4"
2,205 1,496 775
663
588
532
490
456
428
404
358
511
440
1 1/2"
3,307 2,299 1,161 993
880
798
734
683
641
605
536
787
675
2"
6,221 4,331 2,235 1,913 1,696 1,536 1,413 1,315 1,234 1,165 1,033 1,496 1,260
** For reference only. Please consult gas pipe manufacturer for actual pipe capac ities.
Maximum Natural Gas Delivery Capacity with Corrugated Stainless Steel Pipe
in Cubic Feet (ft
3
) per Hour (0.60 Specific Gravity, 0.5" WC Pressure Drop)
Pipe
Size
Length in Feet
10'
20'
30'
40'
50'
60'
70'
80'
90'
100'
150'
200'
3/4"
206
147
121
105
94
86
80
75
71
67
55
48
1"
383
269
218
188
168
153
141
132
125
118
94
82
1 1/4"
614
418
334
284
251
227
209
194
181
171
137
116
1 1/2"
1,261
888
723
625
559
509
471
440
415
393
320
277
2"
2,934 2,078 1,698 1,472 1,317 1,203 1,114 1,042
983
933
762
661
Maximum Liquefied Propane Delivery Capacity with Corrugated Stainless Steel Pipe
in Thousands of BTU/Hour ( 0.5" WC Pressure Drop)
Pipe
Size
Length in Feet
10'
20'
30'
40'
50'
60'
70'
80'
90'
100'
150'
200'
3/4"
325
232
191
166
149
136
126
118
112
106
87
76
1"
605
425
344
297
265
241
222
208
197
186
143
129
1 1/4"
971
661
528
449
397
359
330
307
286
270
217
183
1 1/2"
1,993 1,404 1,143
988
884
805
745
696
656
621
506
438
2"
4,638 3,285 2,684 2,327 2,082 1,902 1,761 1,647 1,554 1,475 1,205 1,045
** For reference only. Please consult gas pipe manufacturer for actual pipe capacities.
GAS
PIPING
Referenced from Uniform Plumbing Code 1997
