The Norwesco 750 Gallon Low Profile Two Compartment Septic Tank carries IAPMO certification and ships with loose plumbing, built from green polyethylene in a low-profile body. The two-compartment design splits the tank interior into two sequential chambers, so settling and clarification happen in stages before effluent moves toward the drain field. At 51 inches tall with a 60 x 92 inch footprint, this low profile septic tank sits in a shallower excavation than a tall single-compartment unit holding the same volume. For how a sequential two-chamber layout behaves as a connected system, the day-tank vs bulk-tank topology guide covers the framing.
Will it work for your install
The tank holds 750 gallons and measures 92 inches long, 60 inches wide, and 51 inches high. The fittings shown on the technical drawing on this page are a 20-inch manway opening for access and pump-out, and a 4-inch outlet. Because there is no factory inlet listed for this unit, confirm the inlet location and the second compartment's access at quote time before you set the tank, and verify your local jurisdiction accepts an IAPMO-certified polyethylene tank for the compartment count you need. Confirm the inlet and outlet invert elevations against your drain-field grade as well, so the line falls correctly through both chambers. If you are weighing one compartment against two, our single compartment vs two compartment septic tanks guide walks through where the second compartment earns its place. For approval scope, see the Norwesco IAPMO and CSA B66 septic tank approvals breakdown, and the Norwesco low-profile series field guide covers handling and setup for this body style.
Loose plumbing and the mistake to avoid
Because this tank ships with loose plumbing, the connections are fitted at install rather than at the factory. Confirm the supplied loose plumbing and any gaskets or seals for the manway and outlet penetrations match the 4-inch outlet size and the 20-inch manway opening before you backfill, since a missed gasket at a penetration is far harder to correct once the tank is buried. The most common mistake on a low-profile septic tank is treating it like a buried hauling tank: it needs uniform, compacted sand bedding under the full footprint and even backfill on all sides so the broad flat bottom does not deflect or rock under load. Set it level on properly prepared ground and confirm the manway and outlet locations match your plumbing layout before backfilling. To right-size the tank against your daily flow and household count, run the numbers through our Tank Sizing Calculator or read the Tank Sizing Guide.
Weight and freight
A full 750 gallons of water and effluent weighs roughly 6,255 pounds across a 60 x 92 inch footprint, so plan bedding, backfill, and unloading equipment around that load before delivery day. This tank carries no published specific-gravity rating, so size the bedding and backfill to the water-weight basis and confirm with the factory before any service heavier than water or effluent. This Norwesco septic tank ships LTL freight from the Hanford, California plant, quoted live to your ZIP code. Use the Freight Cost Estimator for a freight quote, or call 866-418-1777 to confirm fittings, lead time, and delivery to your site. Freight is quoted separately from the tank price.
