Drainage Grates: Round

Neenah Foundry offers a variety of cast iron round drainage grates. Select from the list below to find the round drainage grates that fit your needs.

R-4370 Series

Heavy Duty

R-4370 Series Round Drainage Grate

Catalog Number	Grate Type	Round Feet Open	Weir Perimeter Lineal Feet
R-4370-1	C	0.1	1.7
R-4370-2	G	0.2	2.5
R-4370-3	E	0.4	3.9
R-4370-4	G	0.6	3.9
R-4370-5	G	0.8	4.7
R-4370-6	G	0.8	5.1
R-4370-7	G	0.8	5.2
R-4370-8	E	1.0	5.5
R-4370-9	C	1.3	5.8
R-4370-10	A	1.1	5.8
R-4370-12	F	0.9	5.8
R-4370-13	G	1.3	5.8
R-4370-15	D	1.0	5.9
R-4370-17	D	1.0	6.0
R-4370-18	E	1.3	6.0
R-4370-21	D	0.9	6.0
R-4370-22	D	1.1	6.0
R-4370-23	H	0.9	6.3
R-4370-25	G	1.9	7.6
R-4370-26	G	2.8	8.6
R-4370-27A	G	2.4	9.9

Catalog Number	A	B	G	H	Type
R-4370-1	6-3/8	1-1/4	1 x 1	1/2	C
R-4370-2	9-1/2	2-1/2	1-1/2 x 3-1/2	5/8	G
R-4370-3	15	1-1/4	1 x 12-1/4	1	E
R-4370-4	15	1-1/4	3/4 x 2-1/4	3/4	G
R-4370-5	18	1-1/2	1 x 4-1/2	1-1/4	G
R-4370-6 *	19-1/2	1-1/2	3/4 x 5-1/4	3/4	G
R-4370-7	20	1-3/8	2 x 2	1	G
R-4370-8	21	1-1/4	3/4 x 19-1/2	3/4	E
R-4370-9	22	1-1/2	1-1/8	1	C
R-4370-10	22	1-1/2	1-1/4	1	A
R-4370-12	22	1-1/2	1-3/8 x 5	1	F
R-4370-13 *	22	1-1/2	2 x 6	1-1/4	G
R-4370-15 **	22-1/2	1-3/4	1-1/8	1	D
R-4370-17	22-3/4	1-3/4	1-1/2	1	D
R-4370-18	22-3/4	1-3/4	1-1/2	7/8	E
R-4370-21	23	1-1/2	1-1/4	1	D
R-4370-22 **	23	1-3/4	1	1-1/8	D
R-4370-23	24	1-1/2	2-1/4 x 2-1/4	1-1/2	H
R-4370-25	29	3	3/4	1	G
R-4370-26	33	2	1-1/2	1	G
R-4370-27A	38	1-1/2	1	1	G
* Light Duty. ** Frame not available. § Alternate Type G or Type C grates available. Alternate Type G grate available.

Light Duty

R-4380 Series Flat Bar Drainage Grate

Catalog Number	Grate Type	Round Feet Open	Weir Perimeter Lineal Feet
R-4380-AA1	E	2.8 sq. in.	1.0
R-4380-A	E	3.7 sq. in.	1.1
R-4380-A1	E	6.0 sq. in.	1.2
R-4380-B1	E	4.8 sq. in.	1.3
R-4380-1	E	5.4 sq. in.	1.4
R-4380-3	E	6.0 sq. in.	1.6
R-4380-4	E	0.1	2.1
R-4380-4A1	E	0.1	2.2
R-4380-4A	E	0.2	2.6
R-4380-6	G	0.2	2.8
R-4380-7	G	0.3	3.1
R-4380-8	E	0.3	3.3
R-4380-9	E	0.4	3.7
R-4380-10	E	0.5	3.9
R-4380-11	E	0.5	3.9
R-4380-12	E	0.6	4.0
R-4380-13	G	0.7	4.2
R-4380-13A	E	0.9	4.7
R-4380-14	E	0.7	4.7

Catalog Number	Grate Type	Round Feet Open	Weir Perimeter Lineal Feet
R-4380-15	E	0.6	4.7
R-4380-16	E	0.8	5.0
R-4380-17	E	0.8	5.0
R-4380-18	G	0.7	5.2
R-4380-21	G	1.3	6.3
R-4380-22	G	1.5	7.0
R-4380-23	G	1.1	7.3
R-4380-24	G	1.7	7.9
R-4380-25	G	2.5	8.4
R-4380-26	G	2.7	8.8

Catalog Number	A	B	G	H
R-4380-AA1	3-3/4	3/8	3/8	3/8
R-4380-A	4	1/2	3/8	3/8
R-4380-A1 *	4-3/4	3/8	1/2	3/8
R-4380-B1	5	1/2	1/2	1/2
R-4380-1	5-1/2	1/2	1/2	1/2
R-4380-3 *	6	1	1/2	3/4
R-4380-4 *	8	1/2	5/8	5/8
R-4380-4A1	8-1/2	3/4	1	1
R-4380-4A *	10	3/4	1/2	1/2
R-4380-6	10-1/2	3/4	3-1/2 x 1-1/2	3/4
R-4380-7	11-3/4	1	3/4 x 4-1/4	1
R-4380-8 *	12-1/2	1	1	1
R-4380-9 *	14-1/4	3/4	7/8	15/16
R-4380-10 *	15	5/8	3/4	3/8
R-4380-11	15	1	5/8	3/4
R-4380-12	15-1/4	1/2	5/8	3/8
R-4380-13 *	16	1	1-1/8	1
R-4380-13A	17-3/4	1/2	1 x 3-1/2	1/2
R-4380-14 *	18	3/4	7/8	3/4
R-4380-15 *	18	1	1-1/8	1-1/4
R-4380-16 *	19	1/2	3/4	1
R-4380-17 *	19	1	3/4	1/2
R-4380-18 *	20	1	2 x 2	1-1/4
R-4380-21 *	24	3/4	1/2	1/2
R-4380-22 *	26-5/8	3/4	7/8	3/4
R-4380-23	28	1	2-1/8 x 4	2
R-4380-24	30	3/4	7/8	3/4
R-4380-25 *	32	3/4	1-3/8	1
R-4380-26	33-1/2	3/4	1-3/8	1
R-4380-32	39-3/4	3-1/2	1	1
* Frame available upon request

Light Duty

R-4385 Series Bar Grates

For heavy traffic grates, see the R-4030 Series. Check the grate sizes in the table to be sure they will fit in the pipe you are using.

Catalog Number	Grate Type	Square Feet Open	Weir Perimeter Lineal Feet
R-4385-B	E	0.1	2.1
R-4385-C	E	0.3	2.7
R-4385-E	E	0.5	3.9
R-4385-F	E	0.5	4.8
R-4385-G	E	1.0	5.8
R-4385-H	G	1.6	7.6
R-4385-J	G	2.5	8.6
R-4385-K	G	2.7	9.4

Catalog Number	Pipe Size	A	B	G	H
R-4385-B	6	8	1/2	5/8	9/16
R-4385-C	8	10 3/8	1/2	1/2	7/16
R-4385-D	10	12 1/2	5/8	1/2	1/2
R-4385-E	12	14 3/4	3/4	7/8	7/8
R-4385-F	15	18 1/4	7/8	5/8	3/4
R-4385-G	18	22	1	1	1
R-4385-H	24	29	1 1/4	1 5/16	3/4
R-4385-J	27	32 3/4	1 1/2	1 5/16	3/4
R-4385-K	30	36	3/4	1 1/4	1

All dimensions are listed in inches unless otherwise noted.

To order Neenah Foundry products, please call 800.558.5075.