The Norwesco 1500 Gallon Low Profile Septic Tank (SKU N-43531) is a 1,500-gallon polyethylene tank built for installs where burial depth is limited and a shallow excavation matters. At 51 inches tall on a 69 x 157 inch footprint, this green low-profile septic tank holds its volume in a long, low body instead of a deep one - useful in high water tables, rocky ground, or anywhere the dig has to stay shallow. It is the unit people look for when searching for a Norwesco low profile septic tank in the 1500 gallon size.
Will it work for your install?
Capacity is 1,500 gallons in a single polyethylene body, green in color, measuring 51 inches high, 69 inches wide, and 157 inches long. Confirm both the bed length and the access path before scheduling - 157 inches is over 13 feet end to end, so a 69-inch-wide, 51-inch-tall body on a 13-foot trailer needs adequate gate width and overhead clearance to reach the dig. Access is one 20-inch lid (riser-ready); the technical drawing on this page flags a hazardous-gas warning at that opening, so treat it as a confined space and use the drawing for inlet and outlet locations and invert references before you set the tank. Filled with water, this tank weighs roughly 12,510 pounds - that is the load your bedding and backfill must support across the full footprint, not the as-shipped freight weight, which is quoted on the empty tank. Our Tank Sizing Calculator and Tank Sizing Guide help you confirm 1,500 gallons matches your daily flow and household loading.
The mistake to avoid
The biggest error on a low-profile septic tank is treating it like a standard burial cylinder. The long, shallow shape needs full, even bedding support across the entire footprint - point loads or voids under the shell are what cause deflection and inlet/outlet misalignment over time. Equally important: septic approval is regional. Norwesco septic tanks carry different approvals depending on jurisdiction, so verify this model is accepted by your county or provincial code before you buy. Our guide on Norwesco IAPMO and CSA B66 Septic Tank Approvals walks through US plumbing-code scope versus Canadian cross-border acceptance, and the Norwesco Low-Profile Series field and procurement guide covers handling and compliance for this body style.
Freight
This tank ships LTL freight from Griffin, GA, with additional stocking in Florida and Mississippi, so a live ZIP quote reflects the nearest stocking point. Because of its 69 x 157 inch footprint, this is an oversized LTL shipment - get an exact number before you commit using our Freight Cost Estimator, or call us at 866-418-1777 and we will quote it and walk you through delivery and offload requirements for a tank this size.
