Illinois Administrative Code
Title 77 - PUBLIC HEALTH
Part 905 - PRIVATE SEWAGE DISPOSAL CODE
Appendix A - Illustrations and Exhibits
ILLUSTRATION P - Recirculating Sand Filter Sizing Chart

NUMBER OF BED-ROOMS

SEWAGE FLOW PER DAY (Gal.)

SEPTIC TANK SIZE (Gal.) No Garbage Grinder

RECIRCU-LATION TANK SIZE (Gal.)

AREA OF SAND FILTER (Sq. ft.)

RECOM-MENDED SIZED OF SAND FILTER

NUMBER OF UNDER-DRAINS

NUMBER OF DISTRI-BUTION PIPES

1

200

750

500

100

10' x 10'

1

3

2

400

750

500

133

11' x 12'

1

3

3

600

1,000

500

200

14' x 14'

1

4

4

800

1,250

500

266

16' x 17'

1

5

5

1,000

1,500

500

333

18' x 19'

2

6

6

1,200

1,750

500

400

20' x 20'

2

6

7

1,400

2,000

500

466

20' x 23'

2

6

8

1,500

2,250

500

500

20' x 25'

2

6