Installation Guide

Sizing/Capacity Tables

Table 7.3 Regulator Outlet (8 - 10 in w.c. with 3 in drop)

Maximum Capacity of HOME-FLEX® CSST in Cubic Feet per Hour (CFH) of Natural Gas (Approximate 1000 BTU per cubic foot)

Minimum Gas Pressure: 8 - 10 in w.c. Pressure Drop: 3 in w.c. (Based on a 0.6 specic gravity of gas)

Tube Size EHD

Tubing Length (ft)

5 10 15 20 25 30 40 50 60 70 75 80 90 100 125 150 200 300 400 500

½" 18 222 160 132 116 104 96 84 75 69 64 62 60 57 54 49 45 39 32 28 25

¾" 25 692 493 404 351 314 288 250 224 205 190 184 178 168 159 143 131 114 93 81 72

1" 31 1717 1165 928 790 697 630 536 473 427 392 377 363 340 321 283 256 218 173 148 130

Table 7.4 Medium Pressure (12 - 14 in w.c. with 6 in drop)

Maximum Capacity of HOME-FLEX® CSST in Cubic Feet per Hour (CFH) of Natural Gas (Approximate 1000 BTU per cubic foot)

Minimum Gas Pressure: 12 - 14 in w.c. (½ PSI) Pressure Drop: 6 in w.c. (Based on a 0.6 specic gravity of gas)

Tube Size EHD

Tubing Length (ft)

5 10 15 20 25 30 40 50 60 70 75 80 90 100 125 150 200 300 400 500

½" 18 308 222 184 161 145 133 116 104 96 89 86 84 79 75 68 62 54 45 39 35

¾" 25 1058 764 631 552 497 456 398 359 329 306 296 287 272 259 233 214 187 154 135 121

1" 31 2536 1720 1371 1167 1030 930 791 698 631 579 557 537 503 474 418 378 321 256 218 192

Equivalent Hydraulic Diameter (EHD): A theoretical sizing which is used to compare the

hydraulic performance between manufacturers. A higher EHD number indicates greater

ow capacity of piping.

Tables include losses for four 90 degree bends and two (2) end ttings. Tubing runs with

larger numbers of bends and/or tting shall be increased by an equivalent length of tubing

according to the following formula: L = 1.3 x (n) where L is the additional length of tubing

necessary and n is the number of additional ttings and/or bends.