Gas Piping Sizing Chart - Rinnai V2532FFU Series Operation & Installation Manual

I N S TA L L E R ' S I N S TA L L AT I O N I N S T R U C T I O N S
Nominal
Iron Pipe
Size
Inches
10 20
3/4 278 190
1 520 350
1-1/4 1050 730
1-1/2 1600 1100
After determining the length of pipe required select the pipe size that will supply the
cubic feet per hour of gas required for the input rating of the Rinnai Water Heaters.
The formula for fi guring the cubic feet per hour required is:
*Gas input requirement is on the water heater data plate
*The heating value of the gas can be obtained from the local Natural Gas Utility
(table assumes 11 inches of water column pressure at the inlet, .5 inch drop)
Nominal
Iron Pipe
Size
Inches
10 20
1/2 275 189
3/4 567 393
1 1071 732
1-1/4 2205 1496 1212 1039
Rinnai America

Gas Piping Sizing Chart

Capacity Table for Natural Gas
(table assumes .3 inch pressure drop, specifi c gravity of .60)
Length of Pipe in Feet
30 40 50
152 130 115
285 245 215
590 500 440
890 760 670
Gas Input of Rinnai water heater (BTU/HR)
CFH =
Heating Value of Gas(BTU/FT
Capacity Table for LP Gas
BTUH of undiluted liquifi ed petroleum gases
Length of Pipe in Feet
30 40 50
152 129
315 267 237
590 504 448
913
cubic feet / hour
60 70 80
105 96 90
195 180 170 160
400 370 350 320
610 560 530 490
60 70 80
217 196 185 173
409 378 346 322
834 771 724 677
39
90 100 125 150
84 79 72
150 130 120
305 275 250
460 410 380
3
)
90 100 125 150
162 146
307 275 252
630 567 511
175 200
64 59 55
110 100
225 210
350 320
FF Models