Table 4 - Maximum Capacity* for Copper Tube in a Low Pressure System of Less than 14 inches wc and Pressure Drop of 1 inch wc, CFH.**

Length of Tube, feet	Outside Diameter of Tube, inches
	3/8	1/2	5/8	3/4	7/8	1 1/8	1 3/8
10	35	72	147	257	364	778	1401
20	24	50	101	176	250	535	963
30	19	40	81	142	201	429	773
40	17	34	69	121	172	368	662
50	15	30	61	107	152	326	586
60	13	27	56	97	138	295	531
70	12	25	51	90	127	272	489
80	11	23	48	83	118	253	455
90	11	22	45	78	111	237	427
100	10	21	42	74	105	224	403
125	8.9	18	37	65	93	198	357
150	8.1	17	34	59	84	180	324
175	7.4	15	31	55	77	165	298
200	6.9	14	29	51	72	154	277
250	6.1	13	26	45	64	136	245
Notes: * Includes 20% factor for fittings. ** See Table 7.