6 720 608 032
12
Installation instructions
FOR NATURAL GAS
Maximum Capacity of pipe in Cubic Feet of Gas per Hour for Gas Pressure of 0.5 Psig or less and a Pressure drop
of 0.3 in Water Column (0.75mbar).(Based on a 0.60 Specific Gravity Gas) Btu numbers given in thousands.
Copper tubing is prohibited for use with Natural Gas in the Commonwealth of Massachusetts and not recommended
elsewhere.
Fig. 14
Follow boxed numbers for piping just one GWH 1600 H (example: ¾” B.I. Natural Gas pipe for 20 ft (6.1m). will
handle 190,000 btu’s (55.7 kWh). For multiple appliances combine the total btu input load and then refer to
applicable chart below.
* EHD = Equivalent Hydraulic Diameter. The greater the
value of EHD, the greater the gas capacity of the tubing
.
Maximum Capacity of Semi-Rigid copper Tubing in
Thousands of BTU per Hour of Undiluted Liquefied
Petroleum Gases (at 11 inches Water Column Inlet
Pressure).
(Based on a Pressure Drop of 0.5 Inch Water Column)
* Source National Fuel Gas Code NFPA 54, ANSI Z223.1
- No Additional Allowance is necessary for an ordinary
number of fittings
FOR LP GAS
Maximum Capacity of Pipe in Thousands of BTU per Hour of Undiluted Petroleum Gases (at 11 inches Water Column Inlet
Pressure) (Based on a Pressure Drop of 0.5 Inch Water Column).
* EHD = Equivalent Hydraulic Diameter. The greater the
value of EHD, the greater the gas capacity of the tubing.
Tube
size,
inches
EHD*
10
20
30
40
50
60
1/2
18 EHD 82
58
47
41
37
34
3/4
23 EHD 161 116
96
83
75
68
1
30 EHD 330 231
188
162
144
131
1 1/4 37 EHD 639 456
374
325
292
267
Length of Flexible Corrugated Stainless Steel Tubing (CSST), Feet
Tube
size
inches
EHD*
10
20
30
40
50
60
1/2
18 EHD 129 91
74
64
58
53
3/4
23 EHD 254 183
151
131
118 107
1
30 EHD 521 365
297
256
227 207
1 1/4 37 EHD 971 661
528
449
397 359
Length of Flexible Corrugated Stainless Steel Tubing (CSST), Feet
Copper (LP gas only)
Outside
Length of Tubing, Feet
diameter
Inch
10
20
30
40
50
60
70
80
90 100
3/8
39
26
21
19
_
_
_
_
_
_
1/2
92
62
50
41
37
35
31
29
27
26
5/8
199 131 107
90
79
72
67
62
59
55
3/4
329 216 181 145 131 121 112 104 95
90
Nominal
Iron
Pipe
Internal
Size
Diameter
inches
inches
10
20
30
40
50
60
70
80
90
100 125 150 175 200
3/4
0.824
278 190 152 130 115 105
96
90
84
79
72
64
59
55
1
1.049
520 350 285 245 215 195 180 170 160 150 130 120 110 100
1 1/4
1.380
1050 730 590 500 440 400 370 350 320 305 275 250 225 210
Length of Black Iron Pipe, Feet
N o m inal
Iro n pipe
s ize
inche s
10
20 30 40 50 60 80 100 125 150 200
1/2
291 200 160 137 122 110 94
84
74
67
58
3/4
608 418 336 287 255 231 197 175 155 140 120
1
1145 787 632 541 480 434 372 330 292 265 227
Black Iron Pipe
Lenght of pipe, Feet
