A 1000 gallon single compartment septic tank with gasketed tees
The Norwesco 1000 gallon one compartment septic tank, part number 44473, is a yellow polyethylene tank 102 inches long, 60 inches wide and 63 inches tall, weighing 311 lb empty. It is the standard depth shell for a site where the sewer line leaves the house at normal depth and the dig is straightforward, and the whole 1000 gallons works as one settling chamber. It ships with 4 inch gasketed PVC tee assemblies for the inlet and the outlet; the gasket seals the pipe where it passes through the tank wall, so there is no solvent welding to the tank itself. Access is through a 20 inch gasketed manway. Norwesco lists the tank as IAPMO approved, backs it with a 3 year warranty, and sets the service limit at 130 F.
Does your county accept this tank? Call 866-418-1777 with the county and we will check before you order, or get freight to your ZIP and add it to your cart above.
Who buys a single compartment tank
A single compartment tank is the simplest septic tank made and the one many counties still accept for a house of ordinary size. Solids settle to the bottom, scum floats to the top, and the outlet tee draws the clear liquid from between them to the drainfield. Where the county requires two compartments, the 1000 gallon two compartment tank is the same shell with a baffle; our note on single compartment versus two compartment septic tanks explains the difference and why the second chamber is worth having even where it is not required. Before you order, confirm with your local health department that a single compartment 1000 gallon polyethylene tank is accepted for your bedroom count, and ask us for the state approval documentation they want to see; Norwesco makes versions of this tank for specific states. Our note on Norwesco IAPMO and CSA septic tank approvals explains what the listings cover.
Openings and fittings
- Inlet. A 4 inch gasketed PVC tee assembly. The inlet tee turns the incoming flow downward so it does not stir the scum layer. The inlet sits higher than the outlet.
- Outlet. A 4 inch gasketed PVC tee assembly, drawing from below the scum and above the sludge. If your code calls for an effluent filter in the outlet tee, tell us and we will add one to the order.
- Manway. A 20 inch gasketed manway for inspection and pumping. If the lid will finish below grade, ask us for the riser that brings it to the surface.
- Drawing. Norwesco's drawing, linked under Technical Drawing on this page, gives the inlet and outlet invert heights you need to set the pipe grade from the house and to the drainfield.
Setting it
Follow Norwesco's installation instructions for this tank: they set the bedding, the backfill material and the order in which you fill the tank with water while backfilling so the walls are loaded evenly from both sides. Never backfill an empty polyethylene septic tank and never set one under a drive. Level the bedding on both axes before the tank goes in; a tank set out of level puts the outlet invert in the wrong place relative to the inlet. Seat the gasketed tees square to the wall, connect the pipes, fill with water to the outlet, and then call for the inspection. Yellow makes the tank easy to see in an open hole.
Sizes nearby
The same single compartment tank under other part numbers: the 1000 gallon one compartment septic tank, part number 41718, and the 1000 gallon septic tank, part number 41721. One size down: the 750 gallon one compartment septic tank. One size up: the 1250 gallon one compartment septic tank. Our sizing guide by application covers where each size fits.
Shipping and receiving
The tank ships LTL, 102 by 60 by 63 inches and 311 lb, from the nearest of Norwesco's Griffin, Georgia, Lancaster, Ohio, Owego, New York, Shawnee, Oklahoma, St. Bonifacius, Minnesota, Tooele, Utah or Washougal, Washington plants. The listed price is before freight; the freight cost estimator gives the lane cost to your ZIP, or request a written quote for the permit file. At the tailgate, check the part number against 44473 on the bill of lading, count both tee assemblies and the manway lid, and walk the shell for transit damage before the driver leaves.
Questions before you order? Call 866-418-1777.
Freight and documents
Ships from: Griffin, GA; St. Bonifacius, MN; Owego, NY; Lancaster, OH; Shawnee, OK; Tooele, UT; Washougal, WA. 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 44473.
See this tank
Product video. Watch the Norwesco 1000 Gallon Plastic One Compartment Septic Tank - 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.
