The Norwesco 1000 Gallon One Compartment Septic Tank is an IAPMO-certified polyethylene tank built for single-compartment septic systems. It holds 1,000 gallons in a low-profile yellow polyethylene body measuring 102" long by 60" wide by 63" tall, certified by IAPMO as a single-compartment unit. The yellow body is the visual confirmation you received the correct low-profile septic unit rather than a generic water tank.
Will it work for your system
This is a one-compartment septic tank, so confirm your local code and system design call for single-compartment rather than two-compartment treatment before you buy. The footprint is 60.0 x 102.0 inches with an overall height of 63 inches, which sets your dig depth and how the inlet and outlet line up with your existing pipe runs. Note that the 63-inch figure is the overall tank height; riser and cover allowance is not listed in this spec, so add your riser height on top of the 63 inches when you plan the excavation. Inlet and outlet fitting sizes are also not listed here, so confirm the plumbing connections and any grommets or gaskets needed to seal them with us at 866-418-1777 before you trench. Filled to capacity, water alone weighs roughly 8,340 lb, so plan your bedding and backfill accordingly and never set this tank on uneven or unbedded ground. If you are deciding between a single 1,000-gallon unit and a multi-compartment layout, our single vs two compartment septic tank guide walks through the tradeoffs, and the Tank Sizing Calculator and Tank Sizing Guide help you match capacity to household load.
Certification and cross-border use
This tank is IAPMO certified as a single-compartment septic unit. It carries no specific-gravity rating, so it is intended for septic and wastewater service, not for storing chemicals or liquids heavier than water. If you are installing in Canada or near the border, the approval scope differs between US plumbing codes and Canadian CSA requirements; our breakdown of Norwesco IAPMO and CSA B66 septic tank approvals explains where each certification applies. Always confirm the applicable certification with your local inspector before installation.
The mistake to avoid
A common error with a low-profile polyethylene septic tank is improper bedding and backfill. Polyethylene tanks rely on proper soil support and should be installed per the manufacturer's burial guidelines. Verify your dig matches the 63-inch height plus riser allowance and the 102-inch length, and confirm the single-compartment configuration is approved for your application before ordering. If you need a different profile, our Norwesco doorway tank sizing guide covers the full 100 to 1000 gallon range by application.
This tank ships LTL freight from the nearest Norwesco plant to your delivery ZIP, stocked at multiple Norwesco locations including Griffin, GA; Lancaster, OH; Owego, NY; Shawnee, OK; St. Bonifacius, MN; Tooele, UT; and Washougal, WA. Because it ships from the closest stocking plant, your freight cost depends on your destination, so get an exact quote with our Freight Cost Estimator or call 866-418-1777. Listed before freight, with LTL delivery quoted live to your ZIP.
