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Friction loss chart

Friction Loss Per 100 Feet of Pipe of plastic pipe (Schedule 40 pipe is white and schedule 80 pipe is gray).

Pipe Diameter	1 in.		1 1/2 in.		2 in.		2 1/2 in.		3 in.		4 in
USgph	SCH 40	SCH 80	SCH 40	SCH 80	SCH 40	SCH 80	SCH 40	SCH 80	SCH 40	SCH 80	SCH 40	SCH 80
120	0.55	0.88	0.07	0.10	-	-	-	-	-	-	-	-
300	1.72	2.75	0.22	0.30	0.066	0.10	0.038	0.05	0.015	0.02	-	-
420	3.17	5.04	0.38	0.55	0.11	0.15	0.051	0.07	0.021	0.028	-	-
600	6.02	9.61	0.72	1.04	0.21	0.29	0.09	0.12	0.03	0.04	-	-
900	12.77	20.36	1.53	2.20	0.45	0.62	0.19	0.26	0.07	0.09	-	-
1200	21.75	34.68	2.61	3.75	0.76	1.06	0.32	0.44	0.11	0.15	0.03	0.04
1500	32.88	52.43	3.95	5.67	1.15	1.60	0.49	0.67	0.17	0.22	0.04	0.06
1800	46.08	73.48	5.53	7.95	1.62	2.25	0.68	0.94	0.23	0.31	0.06	0.08
2100	-	-	7.36	10.58	2.15	2.99	0.91	1.25	0.31	0.42	0.08	0.11
2400	-	-	9.43	13.55	2.75	3.83	1.16	1.60	0.40	0.54	0.11	0.14
2700	-	-	11.73	16.85	3.43	4.76	1.44	1.99	0.50	0.67	0.13	0.17
3000	-	-	14.25	20.48	4.16	5.79	1.75	2.42	0.60	0.81	0.16	0.21
3600	-	-	19.98	28.70	5.84	8.12	2.46	3.39	0.85	1.14	0.22	0.30
4200	-	-	-	-	7.76	10.80	3.27	4.51	1.13	1.51	0.30	0.39
4500	-	-	-	-	8.82	12.27	3.71	5.12	1.28	1.72	0.34	0.45
4800	-	-	-	-	9.94	13.83	4.19	5.77	1.44	1.94	0.38	0.50
5400	-	-	-	-	12.37	17.20	5.21	7.18	1.80	2.41	0.47	0.63
6000	-	-	-	-	15.03	20.90	6.33	8.72	2.18	2.93	0.58	0.76
7500	-	-	-	-	-	-	9.58	13.21	3.31	4.43	0.88	1.16
9000	-	-	-	-	-	-	13.41	18.48	4.63	6.20	1.22	1.61
10500	-	-	-	-	-	-	-	-	6.16	8.26	1.63	2.15
12000	-	-	-	-	-	-	-	-	7.88	10.57	2.08	2.75
15000	-	-	-	-	-	-	-	-	11.93	16.00	3.15	4.16
18000	-	-	-	-	-	-	-	-	-	-	4.41	5.83
21000	-	-	-	-	-	-	-	-	-	-	5.87	7.76
24000	-	-	-	-	-	-	-	-	-	-	7.52	9.93

Friction loss in PVC fittings in equivalent feet of straight pipe

This chart gives friction losses for your given flow rate per 100 feet of pipe.
Example: If you have 3600 gallons per hour and you're using 2 inch schedule 40 pipe and you have a 160 feet of pipe, your friction loss is 5.84 x 1.6 =12.99 feet.

Note: It is best to keep your friction loss (per 100 feet of pipe) to less than five feet.

NORMAL PIPE SIZE (IN)	1"	1 1/2"	2"	2 1/2"	3"	4"
90° ELBOW, STANDARD	2.25	4.0	6.0	8.0	8.0	12.0
45° ELBOW, STANDARD	1.4	2.0	2.5	3.0	4.0	5.0
INSERT COUPLING	1.0	1.5	2.0	3.0	3.0	4.0
GATE VALUE	.6	1.0	1.5	1.6	2.0	3.0
MALE-FEMALE ADAPTERS	2.0	3.5	4.5	-	6.5	9.0
TEE - FLOW through RUN	1.7	2.7	4.3	5.1	6.3	8.3
TEE - FLOW THROUGH BRANCH	6.0	8.0	12.0	15.0	16.0	22.0
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