Ill. Admin. Code tit. 77, pt. 890, subpt. M, app A, tbl. L

Current through Register Vol. 49, No. 2, January 10, 2025

Table L - Horizontal Circuit and Loop Vent Sizing Table

Line	Soil or waste pipe diam. (in.)	Fixture Units (max. number	Diameter of circuit or loop vent (in.)
			11/2	2	21/2	3	4	5
			Maximum Horizontal Length (ft.)
1	11/2	10	20
2	2	12	15	40
3	2	20	10	30
4	3	10	20	40	100
5	3	30	40	100
6	3	60	16	80
7	4	100	7	20	52	200
8	4	200	6	18	50	180
9	4	500	14	36	140
10	5	200	16	70	200
11	5	1,100	10	40	140