The Norwesco 1250 Gallon Plastic One Compartment Septic Tank with Gaskets, Tees, and 1 Manhole Cover - IAPMO Certified (MPN N-44476) is a polyethylene septic tank engineered to replace legacy steel and concrete septic tanks — corrosion-immune, lightweight enough for one-truck set, and certified for code-conforming residential septic-system installation.
Design
- Polyethylene shell is corrosion-immune to sewage gases (H2S, CH4, NH3) that pit and crack steel and concrete tanks
- Internal baffle (one-compartment) or compartment-divider wall (two-compartment) integrally molded — no field assembly
- Manway risers and lid accessories sized to the OEM connection — specify when ordering
- Direct-bury rating — rib-reinforced wall handles typical residential backfill loading at code burial depths
- Lightweight enough for one-truck set: typical 1000-gal HDPE septic tank weighs under 300 lb empty vs. 7,000+ lb for equivalent concrete
Installation
Install per the local on-site sewage treatment code (typically a state-level adoption of IAPMO Uniform Plumbing Code Chapter 7 or the International Private Sewage Disposal Code). Bury depth, backfill material, inlet/outlet invert elevations, leach-field sizing, and required permits are jurisdiction-specific — verify with the local health department before excavation. Lay the tank on a level sand or pea-gravel bedding course; backfill with the same material to prevent point-loading on the rotomolded shell.
Common applications
- Remote-research-station and field-camp on-site sewage treatment
- Single-family residential septic primary treatment tank
- Cabin, lake-house, and weekend-property on-site sewage treatment
- RV park, campground, and recreational-facility shared-system septic
- Light-commercial septic for restaurants, gas stations, and small offices in rural jurisdictions
- Replacement for failed steel or concrete legacy septic tanks
Compatibility & compliance
Where carrying the IAPMO IGC 247 certification mark, the tank is approved for residential single-family on-site sewage treatment systems under jurisdictions adopting the Uniform Plumbing Code or International Private Sewage Disposal Code. State-level approvals (Florida, Massachusetts, California, others) are jurisdiction-specific — verify the model's approval status with the local health department before purchase.
Shipping
Ships LTL freight from the nearest manufacturing plant. ZIP-specific freight quotes are available through the freight estimator or by phoning 866-418-1777 with MPN N-44476.
Freight and documents
Ships from: Lancaster, OH; Tooele, UT; Owego, NY; 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 44476.
See this tank
Product video. Watch the Norwesco 1250 Gallon Plastic One Compartment Septic Tank with Gaskets, Tees, and 1 Manhole Cover - IAPMO Certified video (69 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.
