The Norwesco 1000 Gallon Two Compartment Septic Tank is an IAPMO-certified polyethylene tank in yellow, built for residential and light-commercial septic installations that need primary and secondary settling in one vessel. At 102 inches long, 60 inches wide, and 63 inches tall, it carries a 1000-gallon rated capacity split across two internal chambers, giving you the staged solids separation that keeps a drainfield from clogging prematurely. Norwesco molds this tank at multiple plants across the country, so it reaches most of the U.S. without the long haul that drives freight up on a single-source product.
Will it work for your system?
This is a two-compartment design, which matters for code compliance and effluent quality. The first compartment handles the bulk of solids settling and scum retention; the second polishes the effluent before it moves to the next stage of the system, whether that is a distribution box, a pump chamber, or a drainfield. If you are weighing one chamber against two for your jurisdiction, the single compartment vs two compartment septic tank comparison walks through where each is required or preferred. Plan your excavation and access around the full footprint of 60.0 x 102.0 inches and a 63-inch height so the lids and risers sit at the right grade. To confirm the tank size matches your daily flow and bedroom count, run the numbers through the Tank Sizing Calculator or read the Tank Sizing Guide before you dig.
Certification and what to verify
This unit is IAPMO certified, which is the listing many U.S. plumbing-code jurisdictions look for on a septic tank. It is built for septic and wastewater service and carries no published specific-gravity rating, so treat it as a wastewater vessel rather than a chemical-storage tank. Certification scope is not universal, either. If you are installing in Canada or near the border, the rules around CSA B66 differ from U.S. plumbing codes, and the Norwesco IAPMO and CSA B66 septic tank approvals guide spells out exactly what each approval covers. The mistake to avoid here is assuming an IAPMO listing automatically satisfies your local health department. Confirm with your county or provincial inspector that this specific tank and configuration are accepted before you order, because septic approvals are enforced at the local level and vary widely.
Weight, fittings, and footprint
Filled, the tank holds roughly 8,340 pounds of water, so the excavation, bedding, and backfill have to support that load without point-stressing the shell. Review the technical drawing on this page for the inlet and outlet invert positions, lid locations, and overall dimensions before you frame the hole. Because fitting hardware is not itemized in this listing, confirm the inlet and outlet configuration and any seals or grommets against that drawing before ordering. Doorway clearance is rarely an issue at 60 inches wide, but if access to the site is tight, the Norwesco doorway tank sizing guide covers how the 100-to-1000 gallon range fits through standard openings by application.
This 1000-gallon septic tank ships LTL freight, palletized from the nearest of Norwesco's plants in Griffin, GA; Lancaster, OH; Owego, NY; Shawnee, OK; St. Bonifacius, MN; Tooele, UT; or Washougal, WA, with the origin chosen to minimize the haul to you. Freight is quoted live to your ZIP rather than bundled into the listed price, so get an exact number through the Freight Cost Estimator or call us at 866-418-1777 and we will work it out with you.
