Norwesco 1250 Gallon Low Profile Two Compartment Septic Tank Loose Plumbing IAPMO Certified

Where it goes

A 1250 gallon tank is one of the common residential sizes in the Southeast; your county's sizing table, based on bedrooms and soil, sets the minimum for your house. The low profile build is the version for lots with shallow bedrock, a high water table or a tight fall from the house to the drain field. Two compartments are the usual code requirement for new residential systems; our guide to single compartment versus two compartment septic tanks explains why. Approval is local: the state listing covers Georgia, North Carolina and South Carolina, and your county health department issues the permit against its own list. Confirm the model number with them before you order, not after the tank is on site. Our guide to Norwesco's IAPMO and CSA B66 septic approvals and how they map to US plumbing codes covers what the listings mean. Pumpers and installers who move these tanks will also want the low profile tank field operations and procurement guide.

What comes with it and what to check

1. Inlet and outlet. Two 4 inch gasketed PVC tee assemblies, one for each end, shipped loose. The tees go in on site, so the installer can confirm orientation and depth against the house drain and the field line before anything is glued. Standard 4 inch sewer pipe connects to them.
2. Manway. A 20 inch gasketed manway, for inspection and pumping. Plan a riser to grade if the lid will be more than a few inches below finished ground, so the tank can be pumped without digging.
3. Compartments. Two, divided by a moulded baffle. The first takes the inlet and the solids; the second feeds the outlet.
4. Drawing. Norwesco's drawing for this tank, linked under Technical Drawing on this page, shows the inlet and outlet invert heights, the baffle position and the manway location. Give it to the installer with the permit.

Installing it

A polyethylene septic tank is light to set and depends on the backfill for its strength, so Norwesco's installation instructions, not this page, govern the bedding, the backfill material and the fill sequence. Two points are universal: the excavation bottom has to be level and free of rock so the flat bottom bears evenly, and the tank is filled with water as it is backfilled so the walls are supported from both sides. Set the tank so the inlet is the higher of the two tees and check the fall to the field before the pipe is cut. Keep vehicles off the tank area unless the design allows for traffic. Where the water table is high, your installer will size any anti-flotation measures; a tank that is empty and buried wants to float.

Sizes and versions nearby

Same tank with the plumbing fitted at the factory: the 1250 gallon preplumbed two compartment low profile septic tank. Another 1250 gallon loose-plumbing version: the 1250 gallon two compartment low profile septic tank, part number 43503. Single compartment at this size: the 1250 gallon low profile septic tank. One size up: the 1500 gallon preplumbed one compartment low profile septic tank. For Florida sites: the Florida-only 1050 gallon two compartment low profile septic tank.

Shipping and receiving

This is an oversize load at 157 inches long. It ships by flatbed or dedicated truck from Norwesco's Griffin, Georgia plant, 157 by 60 by 51 inches and 416 lb. The listed price is before freight; the freight cost estimator gives the lane cost to your ZIP, and a. Have a machine with forks or straps ready to unload; it is light but long. At the tailgate, check the part number against 43511 on the bill of lading, count the two tee assemblies and the manway lid, and look over the ends and the bottom for transit damage before the driver leaves.

Questions before you order? Call 866-418-1777.