
1000-Gallon (3785-L) Fiberglass Tanks (T1000)
Orenco’s 1000-gallon (3785-L) fiberglass tanks are designed for underground use in onsite residential and commercial wastewater collection and treatment systems, community-wide effluent sewer systems, grease tanks, and non-potable rainwater collection. When used as a septic tank or on-lot, watertight tank, primary treatment occurs in the tank as organic matter is collected and digested, reducing wastewater contaminants by 65-70%.
- Durable, lightweight FRP construction
- Injection-molded for part consistency and quality
- 100% watertight — factory-tested before shipping
- 1210-gallon (4580-L) total tank volume
- Ribbed design and baffle wall for use as a two-compartment tank in various volumes
- Transportable by light truck
- Installable by small backhoe or excavator
- 48-inch (1219-mm) burial depth, empty
- Direct fit for 24-inch (600-mm) Orenco® access risers
- Adapter available for 30-inch (750-mm) access risers
- IAPMO approved for septic tanks and grease tanks
- Not approved for use with potable water
- Stainless steel flathead socket cap screws and hex key wrench included
Fiberglass Tank Volume per Unit of Liquid Depth: 1000-, 1500- and 2000-Gallon Tanks
These tables show the relationship between tank volume, float setting elevation, and liquid depth of the tank. The float setting is measured from the top of the tank to the liquid surface; liquid depth is measured from the liquid surface to the floor of the tank.

ClickTight-compatible PF-series effluent pumps are available. See ClickTight Products for more information.