Pressure Loss Charts

Use the following chart to answer pressure loss related questions. The values represent pressure loss in PSI per 100 feet of pipe for Class 200 PVC.

PSI Loss Per 100 Feet of Pipe Sizes ¾" thru 2½"

	1/2"	3/4"	1"	1 1/4"	1 1/2"	2"	2 1/2"
GPM	PSI Loss	PSI Loss	PSI Loss	PSI Loss	PSI Loss	PSI Loss	PSI Loss
1	-	0.06	0.02	0.01	0.00	0.00	-
2	-	0.22	0.07	0.02	0.01	0.00	0.00
3	-	0.46	0.14	0.04	0.02	0.01	0.00
4	-	0.79	0.24	0.08	0.04	0.01	0.01
5	-	1.19	0.36	0.12	0.06	0.02	0.01
6	-	1.67	0.51	0.16	0.08	0.03	0.01
7	-	2.23	0.67	0.22	0.11	0.04	0.01
8	-	2.85	0.86	0.28	0.14	0.05	0.02
9	-	3.55	1.07	0.34	0.18	0.06	0.02
10	-	4.31	1.30	0.42	0.22	0.07	0.03
12	-	6.04	1.83	0.59	0.30	0.10	0.04
14	-	8.04	2.43	0.78	0.40	0.14	0.05
15	-	9.13	2.76	0.89	0.46	0.16	0.06
16	-	10.29	3.11	1.00	0.52	0.17	0.07
18	-	12.80	3.87	1.24	0.64	0.22	0.09
20	-	15.56	4.71	1.51	0.78	0.26	0.10
22	-	18.56	5.62	1.80	0.93	0.32	0.12
24	-	21.81	6.60	2.12	1.09	0.37	0.15
25	-	23.52	7.12	2.28	1.18	0.40	0.16
26	-	25.29	7.65	2.45	1.27	0.43	0.17
28	-	29.01	8.78	2.82	1.46	0.49	0.19
30	-	32.96	9.97	3.20	1.65	0.56	0.22
32	-	37.15	11.24	3.61	1.86	0.63	0.25
34	-	41.56	12.58	4.03	2.09	0.71	0.28
35	-	43.86	13.27	4.26	2.20	0.74	0.29
36	-	46.21	13.98	4.48	2.32	0.78	0.31
38	-	51.07	15.45	4.96	2.56	0.87	0.34
40	-	56.16	16.99	5.45	2.82	0.95	0.38
42	-	61.47	18.60	5.97	3.08	1.04	0.41
44	-	67.00	20.27	6.50	3.36	1.14	0.45
45	-	-	21.13	6.78	3.51	1.19	0.47
46	-	-	22.01	7.06	3.64	1.24	0.49
48	-	-	23.82	7.64	3.95	1.34	0.53
50	-	-	25.69	8.24	4.26	1.44	0.57
55	-	-	30.65	9.83	5.08	1.72	0.68
60	-	-	36.00	11.55	5.97	2.02	0.80
65	-	-	41.76	13.39	6.93	2.34	0.93
70	-	-	-	15.36	7.95	2.69	1.06
75	-	-	-	17.46	9.03	3.05	1.21
80	-	-	-	19.67	10.17	3.44	1.36