The Norwesco 1500 Gallon Low Profile Two Compartment Septic Tank is an IAPMO-certified polyethylene tank built for installs where burial depth is tight. At 51 inches tall over a 69 by 157 inch footprint, it sits low in the ground while holding 1,500 gallons split across two chambers. The shell is molded from green polyethylene, and the two-compartment layout separates primary settling in the first chamber from the second chamber that feeds your drainfield or pump basin. This model ships from a single Norwesco plant in Hanford, California, on LTL freight priced live to your ZIP, so set your transit and freight expectations around a West Coast origin before you order. If your local code calls specifically for an IAPMO-listed septic tank, that is the certification carried here.
Will it fit your hole and your flow?
Plan the excavation around the 69 x 157 in footprint plus bedding clearance on a level base; at 51 in tall this tank is built to keep burial depth shallow, which is the whole reason to choose a low-profile septic vessel over a taller one where you would otherwise dig deeper or fight a high water table. Confirm those three dimensions against your dig before ordering. Run your daily flow and bedroom count through the Tank Sizing Calculator and the Tank Sizing Guide to confirm 1,500 gallons and a two-compartment design match what your jurisdiction requires. If you are still weighing chamber count, Single Compartment vs Two Compartment Septic Tanks covers where each makes sense, and the outlet sizing guide helps you plan the inlet, cross-over, and outlet tie-ins between the two chambers.
Weight and handling
Plan the set with real numbers. Filled to capacity with water, this tank carries roughly 12,510 lb, so the excavation, bedding, and any equipment staging should be sized for a fully loaded set and the backfill loads that follow. Empty shipping weight is confirmed at quote; once the tank is charged it behaves like a 12,500-plus-pound unit, so bed it level on the specified footprint and follow the burial and backfill sequence shown on the technical drawing on this page.
Approvals and the common mistake
The mistake to avoid is assuming one approval covers every jurisdiction. This unit carries IAPMO certification only; if you are installing near or across the Canadian border, the IAPMO listing and CSA B66 scope are not interchangeable. Our guide Norwesco IAPMO and CSA B66 Septic Tank Approvals lays out where the U.S. plumbing-code scope ends. The other field detail people miss is treating a septic vessel like a hauling tank; the Norwesco Low-Profile Hauling Tank Series guide clarifies that separate series. Confirm your county health department accepts the IAPMO listing before you commit the install.
This tank ships LTL freight from the Norwesco plant in Hanford, California, and freight is quoted live to your ZIP rather than included in the list price. Get a freight estimate with the Freight Cost Estimator, or call 866-418-1777 and we will quote the lane and confirm the IAPMO septic tank specs for your project.
