Below Ground Holding Tanks

Applications include landscape irrigation, drinking water cistern, rainwater harvesting, storm water retention, sewage, water storage for low yielding wells and many others. Large piping is accommodated by generous fitting flats along with lifting lugs for easy transport and tank installation.

The largest capacity below ground storage and holding tanks are made by Norwesco. In addition to the typical use for storing water – both potable and non-potable – these tanks are also used as large capacity septic tanks. The robust tank design accepts up to 4″ plumbing options. The tank’s integral columns provide excellent structural strength.

Holding Tanks

Part # Gallon Capacity Specs Width Overall Height Length Tank Availability Location*
42559 2000 VV 98” 51” 126” H
44593 2000 WW 98” 51” 126″ B,C,E
44079 2500 WW 99” 51” 159” B,E,L
43770 2600 WW 99” 51” 155” B
43771 2650* WW 99” 81” 155” B
44390 3525 WW 102” 51” 211” B,L,T
44876 5025 WW 102” 73” 211” B,F,T
44877 5025* WW 102” 96” 211” B,F,T
Part # Description
62408 20” Lid w/gasket for 2000 (42559)
63672 20” Lid for 2000 (44593), 2500, 2600, 2650, 3525 or 5025 gallon tank
63514 Manhole extension (6”H x 20”D) for 2000 (42559)
62397 Manhole extension (15”H x 20”D) for 2000 (42559)
62396 Manhole extension (24”H x 20”D) for 2000 (42559)
63832 Manhole extension (6”H x 20”D) for 2000 (44593), 2500, 2600, 2650, 3525 or 5025
63833 Manhole extension (15”H x 20”D) for 2000 (44593), 2500, 2600, 2650, 3525 or 5025
63834 Manhole extension (24”H x 20”D) for 2000 (44593), 2500, 2600, 2650, 3525 or 5025

*Tank includes molded on manhole extension

Tank Availability Location Key: B=St. Bonifacius, MN; C=Lancaster, OH; D=Griffin, GA; E=Shawnee, OK; F=Tooele, UT; G=Owego, NY; H=Washougal, WA; I=Sheldon, IA; J=Washington Court House, OH; L=Hanford, CA; P=Petersburg, TX, T=Fairfield, TX; X=Albertville, AL

Below ground holding tanks, also known as underground storage tanks (USTs), serve a wide array of applications due to their discreet placement and ability to store large volumes of liquid or waste.

Water Management

Stormwater Collection: These tanks collect and manage runoff from rain or snowmelt, helping to control flooding and prevent pollution by allowing for treatment before discharge or reuse.

Rainwater Harvesting: They store rainwater for later use in irrigation, reducing reliance on municipal water supplies and aiding in water conservation.

Potable Water Storage: In areas with variable water availability, they can store treated water for household or community use.

Waste Management

Septic Systems: Below ground tanks are crucial for on-site wastewater treatment, holding sewage until it can be treated or collected for off-site disposal.

Greywater Recycling: They store greywater (from showers, sinks) which can be treated and reused for irrigation or flushing toilets.

Industrial Waste: Certain industries use these tanks for the temporary storage of non-hazardous industrial waste before treatment or disposal.

Agricultural Use

Irrigation: For farming, especially in areas with limited surface water, these tanks can store water for irrigation, ensuring a consistent supply during dry periods.

Chemical Storage: They can hold agricultural chemicals like fertilizers or pesticides, reducing the risk of environmental contamination if managed correctly.

Environmental Protection

Oil/Water Separators: Used in areas where oil spills might occur, these tanks separate oil from water, preventing oil from reaching waterways.

Leachate Collection: At landfills, they collect leachate, the liquid that has percolated through the waste, for treatment.

Energy Sector

Fuel Storage: Although less common due to environmental regulations, some facilities use USTs for storing heating oil or diesel for emergency generators.

Thermal Energy Storage: In some innovative applications, tanks store heated or cooled water for energy efficiency in heating or cooling systems.