Norwesco's 1500 gallon plastic septic tank for larger houses and small commercial sites
The Norwesco 1500 gallon septic tank, part number 41761, is a yellow polyethylene tank 135 inches long, 55 inches wide and 70 inches tall, weighing 482 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 1500 gallons it covers the four and five bedroom houses, the duplexes and the small shops and offices that outgrow the smaller septic tanks; your health department's sizing table sets the number for your permit. At 482 lb it still sets with a small excavator, which is the whole case for plastic over concrete on a site a mixer truck cannot reach.
Sizing a system for a bigger house? Call 866-418-1777 with the county and the bedroom count, or get freight to your ZIP and add the tank to your cart above.
Which 1500 gallon Norwesco septic tank is this
Norwesco builds its 1500 gallon septic tank in several configurations in the same shell, and the part number is what separates them. This one, 41761, is the version with adapter and tee plumbing at both ends. Match it to your septic drawing before you order: the number of compartments, whether the tees are gasketed at the wall, and how many manway covers the design calls for. If the drawing asks for two compartments, look at the 1500 gallon two compartment septic tank or the 1500 gallon two compartment septic tank with gaskets, tees and two manhole covers; if it asks for one compartment with two access covers, the 1500 gallon one compartment septic tank with two manholes. Tell us the part number on the drawing and we confirm the tank before it ships. For how Norwesco's approvals read across state and provincial codes, start with our note on Norwesco's IAPMO and CSA B66 septic tank approvals, 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. Capacity, compartments and accepted makers are the county's call. Get it in writing first.
- Inlet and outlet. A 4 inch adapter with a PVC tee assembly at each end. The 4 inch sewer line connects to the adapter; the tees hold the scum layer back from the outlet and stop inlet flow short circuiting across the tank.
- The manway. A 20 inch gasketed manway for pumping and inspection. A riser to grade is the installer's addition and depends on the burial depth.
- The hole. At 135 inches long the excavation is longer than for the smaller tanks; plan the trench and the spoil before the tank arrives. An empty plastic tank is light enough for groundwater to lift, so 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 for setting the grade.
Sizes nearby
One size down: the 1250 gallon one compartment septic tank. If the job is water storage underground rather than sewage, Norwesco's 2000 gallon underground cistern tank is the one to look at instead. The tank sizing calculator and tank sizing guide help when the tank serves a shop, a church or a campground, 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, 135 by 55 by 70 inches on the truck at 482 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 need a forklift or several hands at the drop; a liftgate will not take a tank this long. At the tailgate, check the part number against 41761 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.
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 41761.
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.
