Norwesco 20,000 gallon below ground holding tank is used for Storm Water, Rain Harvesting, Sewage holding. With a 10 foot drop test no cracks appeared. This tank has four manways at 24″ each with adapter rings for the lids. Each manway has 14″ flats on two sides. There are a total of 8 filling flats, lifting lugs and stabilizing legs.

Requirements: 24″ Max Burial Depth. 12″ of Sand Bedding. 3/4 minus backfill to bottom of top fitting flats. Must fill with water during backfill.

Risers Optional: 6″ Riser P/N 64411, Risers can be stacked up to 24″. Optional Safety Lid available.

For more information contact customer service at 1-877-468-2657.