The Norwesco 1250 Gallon Two Compartment Septic Tank pairs a 1,250-gallon working capacity with a low-profile body that stands just 51 inches tall on a 60 x 157-inch footprint, so it drops into a shallower excavation than a comparably sized upright tank. It is molded in green opaque polyethylene, which blocks light and resists algae growth in a buried effluent vessel, and ships with loose plumbing so your installer sets the penetrations to local code. The two-compartment design separates primary settling from the secondary chamber inside one molded tank, which is exactly what most modern septic codes expect ahead of a drainfield or pump chamber. It is IAPMO certified to a septic-tank standard, the listing detail that matters most when an inspector signs off on the install.
At a glance: 51 in H x 60 in W x 157 in L | 1,250 gal | ~10,425 lb full of water | green polyethylene, two-compartment, loose plumbing | IAPMO certified | ships LTL from Griffin, GA.
Will it work for your install
This is a low-profile septic tank, not a potable or chemical-service vessel, so size it by your dwelling's daily flow and bedroom count rather than by raw gallons alone. The 1,250-gallon class is a common residential and light-commercial size; if you are not sure it matches your site, run the numbers with our Tank Sizing Calculator and the Tank Sizing Guide before you dig. Because the tank arrives with loose plumbing rather than pre-installed fittings, your installer sets and seals the inlet, outlet, vent, and tee penetrations to the chosen pipe size per local code — our walkthrough on tank plumbing system design (inlet, outlet, vent) covers how those tie-ins should land. If you are weighing one chamber against two, the single compartment vs two compartment septic tanks guide explains why the two-compartment layout improves effluent quality.
Weight, handling, and the mistake to avoid
Full, this tank holds roughly 10,425 pounds of water across that 60 x 157-inch footprint, so plan the excavation, bedding, and backfill accordingly before delivery day. The most common mistake on a low-profile septic tank is treating its shallow height as license to under-prepare the hole: a flat, well-compacted, properly bedded base is what keeps the tank from deflecting or shifting once it is loaded. The second mistake is approval scope. This unit is IAPMO certified, but acceptance is jurisdiction-dependent, so confirm your local AHJ accepts it before ordering — and if your project is in Canada or near a cross-border code boundary, read our note on Norwesco IAPMO and CSA B66 septic tank approvals to confirm the certification your jurisdiction actually accepts.
Norwesco low-profile field notes
If this tank is part of a hauling or service operation rather than a fixed residential install, the Norwesco low-profile hauling tank series field operations and procurement guide walks through how this low-profile series performs in the field. The low height also makes it a practical choice where overhead clearance or a high water table forces a shallower set.
This tank ships LTL freight from the Norwesco plant in Griffin, GA, quoted live to your ZIP code rather than bundled into the list price. Get an exact number through our Freight Cost Estimator or call 866-418-1777 and we will quote the lane for you.
