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

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

Table G - Building Drains

Diameter of Pipe (inches)	Maximum Number of Drainage Fixture Units (D.F.U.) That May be Connected to Any Portion of the Building Drain
	Grade per Foot
	¹/₁₆ Inch	1/8 Inch	1/4 Inch	1/2 Inch
4	-	180	216	250
5	-	390	480	575
6	-	700	840	1,000
8	1,400	1,600	1,920	2,300
10	2,500	2,900	3,500	4,200
12	3,900	4,600	5,600	6,700
15	7,000	8,300	10,000	12,000