The Norwesco 1000 Gallon Low Profile Two Compartment Septic Tank is built for sites where burial depth and cover are tight. At 51 inches tall with a 60 x 127 inch footprint, this green polyethylene tank lays out long and shallow instead of deep, which keeps the invert high and the dig manageable. It is IAPMO certified and carries two compartments in a single molded body, with a 20-inch manway opening for access and a 4-inch outlet.
Will it work for your install?
This is a 1000-gallon two-compartment septic tank molded from polyethylene in a low-profile configuration. The two-compartment design separates primary settling from the secondary chamber, which is what many local codes call for ahead of a drain field. The compartment split, baffle, and inlet details are shown on the technical drawing on this page rather than in the spec table, so use that drawing to size your inlet tee, baffle, and drain-field connection. The fittings confirmed in the spec data are the 20-inch manway opening and the 4-inch outlet; confirm the inlet location and any riser plumbing against the technical drawing before you set the tank. If you are weighing one chamber versus two for your system, our guide on single compartment vs two compartment septic tanks walks through when each applies. Because septic approval is jurisdiction-specific, verify the IAPMO certification satisfies your local plumbing authority before you order.
Set, weight, and access
The tank stands 51 inches from bottom to top, so on a typical 12-inch cover you are planning for roughly 63 inches of trench depth before bedding allowances. The 60 x 127 inch footprint is the dimension to check against your trench width and setbacks. Filled to capacity with water, the tank carries about 8,340 lb, so the excavation, bedding, and backfill have to be planned for that load before the tank goes in the ground; the dry shipping weight is quoted with your freight. Use the Tank Sizing Calculator and the Tank Sizing Guide to confirm the low-profile layout fits your site before you commit. If you are installing in Canada, the cross-border approval picture matters; our breakdown of Norwesco IAPMO and CSA B66 septic tank approvals covers US code versus Canadian scope, and for the wider low-profile range see the Norwesco low-profile hauling tank series field guide.
The mistake to avoid
The most common error on a low-profile septic tank is treating the molded openings as flexible. The 20-inch manway and 4-inch outlet are fixed fixtures, so set your riser and outlet plumbing to match what is shown on the technical drawing rather than assuming standard locations, and locate the inlet from that same drawing. The other trap is buoyancy: an empty low-profile tank in high groundwater can float during or after backfill, so follow Norwesco's anti-flotation and bedding guidance for your soil conditions. Verify the IAPMO listing meets your inspector's requirements before the tank leaves the dock.
This tank ships LTL freight from the Norwesco plant in Hanford, California, quoted live to your ZIP. Get a number in minutes with the Freight Cost Estimator, or call 866-418-1777 to talk through delivery and access for your site.
