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+

R-4370 Series

Round Drainage Grate

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
  • Most grates listed can be furnished with cast iron angle frame when specified.
  • Frame is of 1/2" metal.
Catalog Number A B G H Type
* Light Duty.
** Frame not available.
§ Alternate Type G or Type C grates available.
Alternate Type G grate available.
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

R-4380 Series+

R-4380 Series

Flat Bar Drainage Grate

Light Duty

R-4380 Series Flat Bar Drainage Grate

  • Angle frame as shown can be furnished with many grates, as noted.
  • Special frame anchors furnished on request.
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
* Frame available upon request
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

R-4385 Series+

R-4385 Series

Bar Grates

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