The Norwesco 1250 gallon one-compartment septic tank sets in a shallow excavation where a tall vertical 1250 would force a deep dig. At just 51 in tall over a 60 x 157 in footprint, the low-profile body is the answer for a high water table or shallow rock, and it ships with loose plumbing so your installer cuts and seats the inlet, outlet, and tee tie-ins to match the elevations your system design calls for. It is molded in green polyethylene and carries an IAPMO listing, the certification many plumbing-code jurisdictions look for on a plastic septic tank.
Will it work for your install?
This is a single 1250-gallon compartment built for the low-profile septic and hauling work Norwesco is known for. The wide, long, shallow shape keeps the tank below grade without a deep dig, which is exactly what you want where the water table is high or rock comes up fast. Because the plumbing ships loose, your installer ports the inlet and outlet at the invert elevations on your approved design rather than fighting fixed factory ports. If you are confirming whether 1250 gallons fits the household or hauling duty, run the numbers with our Tank Sizing Calculator and the Tank Sizing Guide, and see the technical drawing on this page for exact port and rib locations before you trench. For laying out the inlet, outlet, vent, and overflow tie-ins, our tank plumbing system design walkthrough covers the sequence.
Weight, handling, and codes
Filled to capacity this tank holds roughly 10,425 lb of water-equivalent load, so the bedding, backfill, and burial depth have to be right for a low-profile body carrying that mass. Empty it is light enough to position by hand or with light equipment, but plan the set before it goes in the hole, and lay out trench length and equipment access for the full 157 in (about 13 ft) body ahead of delivery day. The IAPMO certification is the piece most inspectors want documented; if you are installing in Canada or near the border, our guide on Norwesco IAPMO and CSA B66 septic approvals spells out where the US plumbing-code scope and the Canadian CSA B66 scope diverge. For the broader low-profile lineup and field practices, the Norwesco low-profile hauling tank series guide is worth a read.
The mistake to avoid
The common miss on a loose-plumbing septic tank is treating it like a pre-plumbed unit. The fittings are intentionally not set at the factory, so confirm your inlet and outlet invert elevations against your approved system design and seat the plumbing accordingly before backfill. Verify the IAPMO listing satisfies your local jurisdiction, since plastic septic approvals vary by state and county. And do not over-bury or under-bed a low-profile tank carrying a 10,000-plus-pound full load.
This tank ships LTL freight from Griffin, GA, quoted live to your ZIP, so your freight scales with distance from the plant and it pays to quote early. Get a freight number with our Freight Cost Estimator or call 866-418-1777 and we will quote it to your delivery address and confirm IAPMO documentation for your jurisdiction.
