The Norwesco 2000 gallon multi-use underground liquid storage tank is a white polyethylene vessel molded for buried water, wastewater, and septic-type service. It holds a 2,000-gallon working capacity in a low-profile body measuring 126 inches long by 98 inches wide by 51 inches tall, which keeps the bury depth shallow and the footprint predictable on a 98 x 126 inch excavation. The shell carries a single flat lower fitting for the outlet connection, and the published specs list it as an underground storage tank built to sit in a broad bed rather than stand above ground. Buyers reach this tank searching for an underground tank, a buried storage tank, or a septic tank, and the multi-use underground design covers all three.
Will it work for your site
Plan the hole and the backfill around the real numbers, not estimates. At 51 inches of tank height plus your inlet and riser stack, this is a wide, shallow tank that sits in a broad bed - confirm your excavation matches the 98 x 126 inch footprint before you dig. Filled to capacity with water, the tank and its contents weigh roughly 16,680 pounds, so the bearing surface and the surrounding soil have to carry that load without settling or point-loading the shell. The technical drawing on this page shows the lower fitting in the flat-bottom position; use it to lay out your plumbing penetrations and verify outlet placement against your drain field or distribution lines before the tank is set. For working through gallon-per-day sizing against household or facility demand, the Tank Sizing Calculator and Tank Sizing Guide walk you through matching capacity to load.
Fittings and the flat lower outlet
The molded shell documents one fitting: a flat lower outlet for the drain connection. That penetration needs a proper bulkhead and gasket seal to stay watertight against the soil and the liquid column, so size and seat your fitting hardware correctly at install. Inlet, riser, and any additional penetration hardware are not part of the molded shell, so plan those into your plumbing package. Call 866-418-1777 to confirm fitting, gasket, and riser options before you order, and check the technical drawing on this page to lay out every penetration against your site plan.
The mistake to avoid: this is a water-and-septic tank, not a chemical tank
The specs list no specific gravity rating for chemical service, which means this tank is built for water, wastewater, and septic-type liquids - not for storing heavier or aggressive chemicals. Do not press it into duty holding a fluid denser than water or a reactive chemical; the absence of an SG rating is the line, not a suggestion. If you need to store something heavier than water, call 866-418-1777 and we will point you to an engineered, higher-rated vessel rather than risk this shell. The second mistake is approvals: underground septic tanks are governed by state and local plumbing and septic codes, and a tank approved in one jurisdiction is not automatically accepted in another. If you are installing across the US-Canada line or in a code-strict county, read Norwesco IAPMO and CSA B66 Septic Tank Approvals before you commit, and confirm acceptance with your local authority.
Freight and ordering
This tank ships LTL freight, quoted live to your ZIP. Norwesco molds from multiple plants, and this tank stocks out of Minnesota and Oklahoma - the nearest shipping points are St. Bonifacius, MN and Shawnee, OK, with Lancaster, OH in the broader network - so your delivery originates from the closest stocking location to keep transit and cost down. Get a precise number for your address with the Freight Cost Estimator, or call 866-418-1777 to confirm delivery scheduling before you place the order. Because this is a wide underground tank, plan for offload equipment at the site - LTL delivery is curbside, and you are responsible for getting the tank into the excavation.
