Norwesco's 1000 gallon plastic septic tank with adapter and tee plumbing
The Norwesco 1000 gallon septic tank, part number 41721, is a yellow polyethylene tank 102 inches long, 60 inches wide and 63 inches tall, weighing 328 lb empty. It comes with a 4 inch adapter and PVC tee assembly at the inlet, the same at the outlet, and a 20 inch gasketed manway for pumping and inspection. The service limit is 130 F, and Norwesco backs the tank with a 3 year warranty. At 328 lb it sets with a small excavator or a few people, which is why plastic tanks go in where a concrete truck and a boom cannot: behind houses, on wooded lots, on islands and up tracks. The 1000 gallon size is the common minimum for a three bedroom house in most jurisdictions; your health department's table sets the number for your permit.
Building new or replacing a failed tank? Call 866-418-1777 with the county and the house size, or get freight to your ZIP and add the tank to your cart above.
Which 1000 gallon Norwesco septic tank is this
Norwesco builds its 1000 gallon septic tank in several configurations in the same shell, and the part number is what tells them apart. This one, 41721, is the version with adapter and tee plumbing at both ends. Before you order, match the part number to the configuration on your septic drawing: the number of compartments, whether the tees are gasketed at the wall, and how many manway covers the design calls for. If the drawing says two compartments, look at the 1000 gallon two compartment septic tank; if it says one, the 1000 gallon one compartment septic tank 41718 or the 1000 gallon one compartment septic tank 44473. Tell us the part number on the drawing and we will confirm the tank before it ships. For how Norwesco's approvals read across state and provincial codes, our note on Norwesco's IAPMO and CSA B66 septic tank approvals is the place to start, and confirm with your county that this model is on their accepted list before the hole is dug.
What to check before you buy
- The permit. The county decides capacity, compartments and which makers and models are accepted. Get that in writing before the order.
- Inlet and outlet. A 4 inch adapter with a PVC tee assembly at each end. Your 4 inch sewer line connects to the adapter; the tees keep floating scum away from the outlet and stop the inlet flow short circuiting across the tank.
- The manway. A 20 inch gasketed manway for pumping and inspection. If the tank is buried deep, a riser to grade is the installer's addition and depends on the depth.
- Burial and water table. An empty plastic tank is light enough for groundwater to lift. Follow Norwesco's installation instructions for bedding, backfill and filling the tank with water as the hole is filled. The drawing linked under Technical Drawing on this page gives the inlet and outlet invert heights the installer uses to set the grade.
Sizes nearby
One size down: the 750 gallon one compartment septic tank. One size up: the 1250 gallon one compartment septic tank. The tank sizing calculator and tank sizing guide help when the tank serves a shop, a cabin or a campground rather than a house, where the bedroom count does not apply.
Shipping and receiving
The tank ships LTL at freight class 300 under NMFC 156600-02 from Norwesco's plant in Hanford, California, 102 by 60 by 63 inches on the truck at 328 lb. 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. The carrier will want a forklift or a few hands at the drop, because a liftgate does not take a tank this long. At the tailgate, check the part number against 41721 on the bill of lading and look at both tees, the manway cover and the gasket before the driver leaves. Keep it out of the wind until it is in the hole; an empty plastic tank moves in a gust.
Questions before you order? Call 866-418-1777.
Freight and documents
Ships from: Hanford, CA. 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 41721.
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.
