Columbia CT-10, Installation, Operation And Maintenance Manual, Page: 10 / 56

CAPACITY OF PIPE - CUBIC FEET OF GAS PER HOUR
AT 0.2" W.C. PRESSURE DROP
Equivalent
1" 1-1/4" 1-1/2" 2" 2-1/2" 3" 4"
Length (ft)
10
425 725 1170 2360 4300 6250 12800
20
300 520 800 1700 3000 4500 9300
30 250 425 690 1400 2500 3750 7500
40 210 360 560 1200 2100 3200 6400
50
190 325 500 1100 1900 2850 5800
60
180 300 480 1000 1800 2300 4800
80 150 260 410 850 1550 2000 4200
100 135 230 370 750 1375 1680 3500
150
110 190 300 600 1100 1200 2750
200
75 165 260 540 950 1000 2000
Fitting Equivalent Lengths of Standard Pipe in Feet for Listed Fittings
Std. Tee 5.5 7.5 9.0 12.0 13.5 15 20
Std. Elbow 2.7 3.7 4.5 5.5 6.1 8 11
COLUMBIA BOILER COMPANY, REV 2-17
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REQUIRED INPUT - CUBIC FEET OF GAS PER HOUR
GAS TYPE CT-10 CT-15 CT-20 CT-25 CT-35 CT-50
NATURAL 399 630 840 1050 1470 2100
PROPANE 160 252 336 420 735 840
Vent lines, if required, are to be run outside the building, stopping clear of windows or
fresh air intakes. The vent should terminate in a way that will not allow the possibility of
water, dirt, insects, animals, and other matter from entering and clogging the vent pipe.
Gas lines should be tested for leaks using a soap solution. Your gas company may wish to
witness this test.
Do not
exceed the maximum pressures allowed by the valve train.
Additional gas piping information is included in the burner section of this manual.