Norwesco's Illinois build of the 1250 gallon one compartment low profile septic tank
The Norwesco 1250 gallon one compartment low profile septic tank, part number 43539, is a green polyethylene septic tank 157 inches long, 60 inches wide and 51 inches tall, weighing 445 lb empty. It is the build Norwesco ships for Illinois: its state septic approval list for this part number names Illinois, and the tank comes from the Lancaster, Ohio plant. The low profile body goes into a shallow excavation, and the single chamber is the plain layout for a conventional tank and drainfield. The plumbing ships loose, a 4 inch gasket with tee assembly for the inlet and another for the outlet, fitted on site so the tees line up with the pipe runs. Access is a 20 inch opening on top. Norwesco lists the tank as IAPMO approved, rates it to 130 F and backs it with a 5 year warranty. Full of water it holds 10425 lb.
Installing in Illinois? Call 866-418-1777 with the county and the system design, or get freight to your ZIP and add it to your cart above.
Which 1250 one compartment tank to order
Norwesco builds the same 1250 gallon one compartment body in several part numbers, and the difference between them is the state approval each one carries, not the tank. Order this one, 43539, for an Illinois install. For other states, tell us where the tank is going and we point you at the part number on that state's list; a tank bought on the wrong number can fail the inspection even though it is the same body. The permit itself comes from the county health department against the system design. A 1250 gallon tank is a common size where the code sizes on bedrooms, and if the design calls for two chambers, Norwesco builds the 1250 gallon two compartment tank with loose plumbing in the same footprint. Our guide to Norwesco IAPMO and CSA B66 septic tank approvals explains what the listing covers.
Openings, plumbing and what to check before you buy
- Inlet and outlet. A 4 inch gasket with tee assembly at each end, shipped loose. The gasket seals the pipe in the tank wall; the tee drops the inflow below the scum layer and holds solids back at the outlet. Fit them before the tank goes in the hole, with the inlet tee turned to the house line and the outlet tee to the drainfield line.
- Access. A 20 inch opening on top for pumping and inspection. If the burial puts it below grade, a riser brings the lid up; tell us the depth and we quote one with the tank.
- Pipe falls. The inlet sits higher than the outlet, so the house line and the drainfield line are set to the tank. Our tank plumbing walkthrough covers the tie in.
- Drawing. Norwesco's drawing for this tank is linked under Technical Drawing on this page and gives the inlet and outlet heights for the excavation plan.
Setting it
Follow Norwesco's installation instructions and the conditions on your permit. Dig to the drawing, bed the tank on a level, rock free base, fill it with water as you backfill so the walls are supported from both sides, and keep vehicles off the area for good. In wet ground an empty tank wants to float, so do not leave it empty in an open hole overnight. Have the inspector see the tank set and the plumbing connected before the backfill covers it.
Related tanks
Norwesco's other 1250 gallon low profile tank: the 1250 gallon low profile septic tank. Two compartments with the plumbing already installed: the 1250 gallon preplumbed two compartment tank. One size up, preplumbed: the 1500 gallon preplumbed one compartment tank. For Florida, the Florida only 1050 gallon two compartment tank.
Shipping and receiving
At 157 inches long the tank is an oversize shipment despite its 445 lb, and it travels on a flatbed or a long trailer from Norwesco's Lancaster, Ohio plant, a short lane into Illinois. The listed price is before freight; the freight cost estimator gives the lane cost to your ZIP, or request a written quote for a job that needs paperwork. Have two people or a machine to take it off the truck. At the tailgate, check 43539 against the bill of lading, count the loose tee assemblies, and look along the ribs for transit damage before signing.
Questions before you order? Call 866-418-1777.
Freight and documents
Ships from: Lancaster, OH. LTL freight is quoted to your ZIP with the freight cost estimator or by phone at 866-418-1777. The listed price is before freight.
Technical drawing (PDF) for Norwesco 43539.
See this tank
Product video. Watch the Norwesco 1250 Gallon Plastic One Compartment Septic Tank with Loose Plumbing and Low Profile Design - IAPMO Certified video (62 seconds) with dimensions, fittings and shipping notes.
Ready to order?
Add it to your cart at the top of this page, get LTL freight to your ZIP, request a written quote, or call 866-418-1777. The listed price is before freight.
