N.J. Admin. Code § 7:9A-9.5 - Laterals; gravity distribution

(a) Except as provided by 7:9A-9.8, gravity flow networks and gravity dosing networks may consist of a single distribution lateral, two or more laterals connected by means of elbows or tees, or two or more separate distribution laterals connected independently to a distribution box. Distribution laterals shall meet all the following requirements:

1. Distribution laterals shall be a minimum of three inches in diameter.

2. Distribution laterals shall consist of lengths of rigid perforated pipe connected with tight joints.

3. Spacing and arrangement of distribution laterals shall conform with 7:9A-10.3(d).

4. Perforations shall be evenly spaced along two rows running the length of the pipe, on each side, midway between the invert and the center-line which separates the upper and lower halves of the pipe. Perforations shall be no smaller than three-eighth inch and no longer than three-quarter inch in diameter.

5. Each individual distribution line shall be approximately level and shall be capped at the end, except where the laterals are connected together by loops. In no case shall the slope of the distribution lines be greater than two inches per 100 feet.

6. An inspection port shall be provided in each corner of the disposal bed or at each end of a disposal trench. Inspection ports shall consist of a perforated pipe with a removable cap, extending from the level of infiltration to finished grade.

(b) The following materials are acceptable for distribution laterals:

1. Clay pipe, standard and extra strength perforated (ASTM C-211); or

2. Plastic:

i. Acrylonitrile-Butadiene-Styrene (ABS) (ASTM D-2751);

ii. Polyvinyl Chloride (PVC) (ASTM D-2729, D-3033, D-3034);

iii. Styrene-Rubber (ASTM D-2852, D-3298); or

iv. Polyethylene, straight wall (ASTM F-810).

Notes

N.J. Admin. Code § 7:9A-9.5

Amended by R.1993 d.294, effective 6/21/1993.
See: 24 N.J.R. 1987(a), 25 N.J.R. 2704(b).
Amended by R.1999 d.314, effective 9/20/1999.
See: 31 N.J.R. 1416(a), 31 N.J.R. 2741(a).
In (b)2iv, substituted "(ASTM F-810)" for "(ASTM D-1248)" at the end.
Amended by R.2012 d.066, effective 4/2/2012.
See: 43 N.J.R. 478(a), 44 N.J.R. 1047(a).
In the introductory paragraph of (a), substituted "Except as provided by N.J.A.C. 7:9A-9.8, gravity" for "Gravity".