The Norwesco 525 Gallon Plastic Septic Pump Tank (SKU N-44831) is a black polyethylene tank built to hold and dose effluent in a pumped septic system. It measures 62 inches tall on a 64 x 64 inch square footprint, so before you commit to a location, confirm your excavation and the access path can take that base. Capacity is rated at 525 gallons. This is the tank only - the effluent pump, float switches, and control panel are sized to your design flow and supplied separately.
Confirm approval before you buy
Septic tank acceptance is set by your local health department or authority having jurisdiction, and a model accepted in one place may need separate listing in another. Before ordering, confirm this Norwesco model is on your jurisdiction's approved list. Our guide to Norwesco IAPMO and CSA B66 septic tank approvals walks through the cross-border and US plumbing-code scope so you don't specify an unlisted tank into a permitted install.
Will it work for your install?
This is a pump-style septic tank used to lift effluent in a pumped system. Sizing the chamber correctly matters: a tank undersized for your dose volume or daily flow forces the pump to cycle too often, while an oversized one wastes burial space. Work through the Tank Sizing Calculator and the Tank Sizing Guide to match this 525-gallon tank to your design flow. Rated service here is effluent at roughly water-weight loading, so if your design calls for more capacity, size up rather than overloading this tank. We do not have published inlet/outlet sizes, grommets, or bulkhead fittings for this model, so confirm penetration size and seal type - grommet versus bulkhead versus uniseal - against your pump discharge pipe and riser before ordering, and source the matching gasket or grommet for a watertight effluent seal. Call us at 866-418-1777 and we will confirm available configuration details.
Weight, handling, and the mistake to avoid
Filled to capacity this tank carries roughly 4,378 pounds of water weight - not a one-person lift, and a number that doubles as your install-time warning. A buried septic pump tank must be set on a properly bedded, level base. The flotation risk, though, is the EMPTY condition: a light, hollow poly tank in a high-water-table soil gets pushed upward, and the 4,378 lb figure applies only when full, giving you no flotation protection during install or pump-down. Specify anti-flotation ballast or anchoring for the empty case. Setting one of these on uncompacted fill or skipping anti-flotation provisions is the most common and most expensive septic-tank mistake.
This tank ships LTL freight from the Norwesco plant in Griffin, GA, with the cost quoted live to your delivery ZIP based on distance and accessorial needs such as liftgate, residential, or limited-access delivery. Get an exact number through the Freight Cost Estimator, or call 866-418-1777 and we will quote it for you and confirm the right configuration for your septic build. You see the tank price and the freight quote separately - we never bury freight in the list price.
