The Norwesco 1500 Gallon Two Compartment Septic Tank is a yellow polyethylene tank built for septic systems, measuring 70 inches tall, 55 inches wide, and 135 inches long with a 55.0 x 135.0 inch footprint. It uses a two-compartment design with two manholes and carries IAPMO certification with approval for installation in Canada. If you are deciding between this and a single-tank setup, our guide on single compartment vs two compartment septic tanks walks through how the divided design affects solids settling and effluent quality.
Does this septic tank fit your system?
This Norwesco tank holds 1500 gallons split across two compartments. Your local health department or system designer sets the required capacity, so use our Tank Sizing Calculator and the Tank Sizing Guide to confirm the gallon target before you order. Plan the excavation around the full 135-inch length and 55-inch width, and remember the tank stands 70 inches tall, so account for excavation depth plus the soil cover your design calls for and confirm riser height to bring both manholes up to grade. Verify the two manhole locations line up with your riser and inspection access before digging. One spec to nail down before ordering: this pack does not list the inlet and outlet invert connections, so confirm pipe size and invert drop against the technical drawing on this page and your system plan rather than assuming them.
Approved in Canada and IAPMO certified
This is one of Norwesco's IAPMO-certified septic tanks approved for use in Canada, which matters if your jurisdiction recognizes IAPMO listings rather than a separate provincial product mark. Keep in mind that IAPMO certification is a product listing, not an automatic local permit; your inspector or AHJ still has the final say on what is accepted. The approval scope is not identical to every U.S. plumbing code either, so confirm what your code official will accept before purchase. Our breakdown of Norwesco IAPMO and CSA B66 septic tank approvals covers the cross-border scope so you do not buy a tank your inspector will reject.
Weight, handling, and freight
This is a large polyethylene septic tank that is lightweight to set in place empty but heavy once in service: filled with water it carries roughly 12,510 pounds, so the bedding and surrounding soil must be prepared to support a fully loaded tank. It ships LTL freight from the nearest Norwesco plant to your project, with plants in Lancaster, OH; Owego, NY; St. Bonifacius, MN; and Washougal, WA. Because a tank this size and weight is freight-sensitive, ZIP-based routing matters: Washougal serves the West, St. Bonifacius the upper Midwest, Lancaster the central and eastern states, and Owego the Northeast. Freight is quoted live to your delivery ZIP rather than included in the listed price. Get a number in seconds with our Freight Cost Estimator, or call 866-418-1777 and we will route the order from the plant closest to you to keep transit time and cost down.
