Rinnai manual Model 2424WC, Gas Pipe Sizing Chart

INSTALLER’S INSTALLATION INSTRUCTIONS

Gas Pipe Sizing Chart

Capacity Table for Natural Gas

cubic feet / hour

(table assumes .3 inch pressure drop, specific gravity of .60)

Nominal					Length of Pipe in Feet
Iron Pipe
Size
Inches	10	20	30	40	50	60	70	80	90	100	125	150	175	200
3/4
	278	190	152	130	115	105	96	90	84	79	72	64	59	55
1	520	350	285	245	215	195	180	170	160	150	130	120	110	100
1-1/4	1050	730	590	500	440	400	370	350	320	305	275	250	225	210
1-1/2	1600	1100	890	760	670	610	560	530	490	460	410	380	350	320

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 Continuum 2424WC. The formula for figuring the cubic feet per hour required is:

CFH = Gas Input of Continuum 2424(BTU/HR)

Heating Value of Gas(BTU/FT3)

*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

Capacity Table for LP Gas

BTUH of undiluted liquified petroleum gases

(table assumes 11 inches of water column pressure at the inlet, .5 inch drop)

Nominal	Length of Pipe in Feet
Iron Pipe
Size
Inches

1/2

3/4

1

1-1/4

10	20	30	40	50	60	70	80	90	100	125	150
275	189	152	129
567	393	315	267	237	217	196	185	173	162	146
1071	732	590	504	448	409	378	346	322	307	275	252
2205	1496	1212	1039	913	834	771	724	677	630	567	511

Model 2424WC 2 7 800-621-9419