The Norwesco 1000 Gallon One Compartment Septic Tank is an IAPMO-certified, single-chamber polyethylene tank for septic systems. It holds 1,000 gallons in one compartment, measures 102 inches long by 60 inches wide and stands 63 inches tall, and is molded in yellow polyethylene. If you are still working out tank size for your household or drainfield, run the numbers through our Tank Sizing Calculator and the Tank Sizing Guide before you settle on a burial location and excavation depth.
Will it work for your install?
This is a one-compartment design, which matters when your local code or system designer specifies single versus dual-chamber treatment. Single-compartment tanks are common where a separate effluent filter or downstream component handles solids carryover; if your permit calls for two compartments, this is not the tank. Our guide on single compartment vs two compartment septic tanks walks through where each is appropriate. The 102 x 60 inch footprint and 63-inch height drive your excavation, so confirm your dig depth and bedding against your site plan. Filled to capacity the tank carries roughly 8,340 pounds of water weight, so size the hole, the backfill, and any required burial provisions to that loaded figure rather than the empty tank.
Inlet, outlet, and the technical drawing
Inlet and outlet port sizes and invert elevations are not listed in this product's spec data, so verify them against the technical drawing on this page, or call us, before you set the tank and tie in your piping. Match the drawing's inlet and outlet locations to your run elevations so the tank sits at the correct depth the first time. If your site has a high water table, your designer may also require anti-flotation provisions; that is a site condition rather than a feature of the tank, so check your soils and groundwater report.
IAPMO certification and approvals
This tank is IAPMO certified, the listing many jurisdictions reference for plumbing-code acceptance. Approval rules vary by state and by Canadian province, so verify the specific listing your permit requires before ordering. Our explainer on Norwesco IAPMO and CSA B66 septic tank approvals covers the cross-border scope of these certifications versus US plumbing codes, which helps if you are installing near or across the Canadian border. For burial preparation and sizing by application, see our Norwesco sizing guide by application.
The mistake to avoid
The most common error on a 1,000-gallon septic install is treating the tank as drop-in for any permit. Confirm two things first: that your jurisdiction accepts a single-compartment IAPMO-listed tank for this application, and that your excavation accounts for the full 8,340-pound filled weight plus proper bedding and backfill. Settling those before you dig saves a second mobilization of equipment.
This tank ships LTL freight from one of seven Norwesco plants - Griffin, GA; Lancaster, OH; Owego, NY; Shawnee, OK; St. Bonifacius, MN; Tooele, UT; and Washougal, WA - with the origin and exact cost returned per ZIP. Get your freight cost with our Freight Cost Estimator, or call 866-418-1777 to confirm certification listings and lead time before you order.
