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Rainwater System Documents
Standard Plate (2.1 MB)
Plastic Chamber Units for Rainwater Harvesting System

• Must be 36 inches long, 18 inches wide and 18 inches high.

• Must be injection molded for consistency and constructed of a lightweight (0.085 inch min.), perforated, polypropylene top and bottom supported by 8, evenly spaced, 2 3/8 inch diameter, rigid (0.085 inch min.) PVC columns.

• Ends and side panels must be perforated and made of lightweight (0.085 inch min.) polypropylene.

• Must have a 97% void factor and must conform to HS-25 loading requirements.