Septic / Precast
Precast tanks, Delta systems, Infiltrator products, risers, specs, and onsite treatment resources.
AAA Zoellner manufactures Class #1 / NSF approved concrete aerobic and non-aerobic septic tanks, grease traps, holding tanks, pump tanks, drip irrigation tanks, low-pressure pipe (LPP) tanks, and custom precast products.
Distributor and product support
Treatment System Options
AAA Zoellner is a distributor of Delta Treatment Systems and Infiltrator Water Technologies, offering a broad lineup of wastewater treatment tanks, products, and field options with competitive pricing and quality.
Residential systems around 500 gallons per day and commercial systems up to 250,000 gallons per day may be supported through the appropriate tank, treatment unit, field product, or engineered package.
Final product selection, NSF 40 / NSF 245 applicability, flow rating, soil suitability, and permitting requirements should be confirmed for the specific site and jurisdiction before installation.
Precast products
- Concrete aerobic and non-aerobic septic tanks
- Grease traps and oil interceptors
- Holding tanks and pump tanks
- Drip irrigation tanks and low-pressure pipe (LPP) tanks
- Custom precast concrete products
Treatment options
Good, Better, Best, and newer field options.
Good: Delta ENVIRO-AIRE
Delta ENVIRO-AIRE Advanced Wastewater Treatment Units use long-standing wastewater treatment technology scaled to residential daily flow rates. Product documentation notes certification to NSF/ANSI 40 average effluent quality standards with 12 mg/L BOD and 16 mg/L TSS.
Better: Whitewater DF and UC Series
Delta Whitewater aerobic treatment systems, including DF and UC series, have been tested under NSF/ANSI 40 and met or exceeded Class I requirements. Whitewater is a commonly selected local system and a strong performer outside fixed-film membrane systems.
Best: Delta ECOPOD
Delta ECOPOD Advanced Wastewater Treatment Units are used where nitrogen reduction is required. Product documentation states ECOPOD has been tested under NSF/ANSI 40 and 245, with average nitrogen reduction greater than 50%, without supplementary chlorination or UV components.
Newest option: Presby AES
Presby Advanced Enviro-Septic treatment and dispersal can be used where proper soils are available. Presby highlights contaminant removal without electricity or replacement media and a smaller, less complicated treatment footprint.
Infiltrator EZflow
EZflow by Infiltrator is a gravelless pipe and aggregate drainfield product. Pre-assembled units include perforated drain pipe surrounded by engineered aggregate and high-strength netting to reduce compaction and fines concerns.
Whitewater concrete tank enhancements
Construction, serviceability, and owner benefits.
Improvements made
- Superior concrete design, specifications, and 6000 psi concrete as poured
- One-piece tank construction
- Large pretreatment chamber
- Identifiable badges for system type and size
- All stainless hardware
- Sealed accesses against water or gas infiltration
- Enclosed, gas-free, ventilated compressor compartment
- Accessible liquor inspection and sampling port
- Panel and configuration options
- Improved electrical components and controls
Benefits for owners and service providers
- Efficiency, performance, durability, and longevity
- Lower total suspended solids and system volatility
- Zero moving parts within the tank
- No filters or media to inspect or maintain
- Rebuildable linear compressors
- Surge tolerance
- Fewer callbacks
- Easier maintenance
- Longer pump-out intervals
- Simple single 30-amp / 115V electrical circuit
Product photos and diagrams
Product photos, diagrams, risers, and precast examples.
Risers and adapter rings
Plastic and concrete riser options.
Plastic risers
Stackable in 6 in. and 12 in. increments. Available diameters are 12 in., 16 in., 20 in., and 24 in.
- 6 in. tall: 12-RIS-GREEN, 16-RIS-GREEN, 20-RIS-GREEN, 24-RIS-GREEN
- 12 in. tall: 12×12-RIS-GREEN, 16×12-RIS-GREEN, 20×12-RIS-GREEN, 24×12-RIS-GREEN
EZ Snap Infiltrator risers
The EZsnap riser creates an easy-to-assemble watertight riser system for septic tanks, pump tanks, and cisterns. Click-and-lock technology eliminates assembly tools, sealant/caulk, and hardware.
The 24 in. diameter EZsnap riser is available in 2 in., 6 in., and 12 in. tall sections that nest for efficient storage and shipping.
Concrete risers and lids
- 11 in. concrete riser – 24 in. ID / 28 in. OD
- 11 in. concrete riser – 14 in. ID / 19 in. OD
- Concrete lid – 18 in. ID / 21 in. OD
- Concrete lid – 28 in. ID / 31 in. OD
Concrete tanks and delivery
Tank construction, field components, and jobsite placement support.
AAA Zoellner makes grease traps, holding tanks, pump tanks, drip irrigation tanks, and low-pressure pipe (LPP) tanks. Concrete tanks are built with 6000+ psi concrete, full welded wire mesh, and rebar reinforcement, supporting strength, durability, and lower permeability compared with lighter-duty alternatives.
Tanks are delivered by heavy-duty knuckle-boom crane trucks. The 360-degree articulating knuckle-boom and 30 feet of reach provide more on-site versatility for difficult site conditions.
A full line of pumps, field, and electrical components for new installations or repairs now offered.
Related service
Use AAA Zoellner hauling and trucking for certified soil, topsoil, fill dirt, sand, gravel, and other site material needs.
Trucking / HaulingTank specifications
Tank specifications and product options.
All tanks come standard with 4 in. inlets/outlets and plastic baffles unless otherwise specified. Tank height dimensions below do not include standard riser height.
Non-Aerobic Septic Tanks
| Model | Inlet / outlet | Dimensions L x W x H |
|---|---|---|
| 500 gal. Standard Single-Compartment | 54 in. inlet / 51 in. outlet | 5 ft 7 in. x 4 ft 2 in. x 5 ft 7 in. |
| 750 gal. Standard Single-Compartment | 46 in. inlet / 43 in. outlet | 7 ft 10 in. x 5 ft 7 in. x 5 ft 0 in. |
| 1000 gal. Standard Single-Compartment | 54 in. inlet / 51 in. outlet | 7 ft 10 in. x 5 ft 7 in. x 5 ft 7 in. |
| 1000 gal. Lowboy Two-Compartment | 39 in. inlet / 36 in. outlet | 11 ft 8 in. x 5 ft 7 in. x 4 ft 5 in. |
| 1250 gal. Standard Two-Compartment | 46 in. inlet / 43 in. outlet | 11 ft 8 in. x 5 ft 7 in. x 4 ft 11 in. |
| 1500 gal. Standard Two-Compartment | 54 in. inlet / 51 in. outlet | 11 ft 8 in. x 5 ft 7 in. x 5 ft 7 in. |
Aerobic / Class 1 NSF Approved Septic Tanks / ATUs
| Model | Inlet / outlet | Dimensions L x W x H |
|---|---|---|
| 500 GPD Class #1 Tank | 61 in. inlet / 56 in. outlet | 9 ft 10 in. x 6 ft 9 in. x 5 ft 11 1/2 in. |
| 600 GPD Class #1 Tank | 61 in. inlet / 56 in. outlet | 9 ft 10 in. x 6 ft 9 in. x 5 ft 11 1/2 in. |
| 750 GPD Class #1 Tank | 66 in. inlet / 64 in. outlet | 10 ft 2 in. x 7 ft 11 in. x 6 ft 5 in. |
| 900 GPD Class #1 Tank | 69 in. inlet / 64 in. outlet | 10 ft 2 in. x 7 ft 11 in. x 6 ft 5 in. |
| Larger systems | Available by project | Confirm with AAA Zoellner |
Grease Traps / Oil Interceptors
| Model | Inlet / outlet | Dimensions L x W x H |
|---|---|---|
| 1000 gal. Standard Two-Compartment Trap | 39 in. inlet / 36 in. outlet | 11 ft 8 in. x 5 ft 7 in. x 4 ft 5 in. |
| 1250 gal. Standard Two-Compartment Trap | 46 in. inlet / 43 in. outlet | 11 ft 8 in. x 5 ft 7 in. x 4 ft 11 in. |
| 1500 gal. Standard Two-Compartment Trap | 54 in. inlet / 51 in. outlet | 11 ft 8 in. x 5 ft 7 in. x 5 ft 7 in. |
| 2800 gal. Standard Two-Compartment Trap | 88 in. inlet / 85 in. outlet | 10 ft 9 in. x 5 ft 8 in. x 8 ft 0 in. |
Holding Tanks
| Model | Inlet note | Dimensions L x W x H |
|---|---|---|
| 1000 gal. Standard Single-Compartment Tank | 54 in. inlet | 7 ft 10 in. x 5 ft 7 in. x 5 ft 7 in. |
| 1200 gal. Lid-Inlet Two-Compartment Tank | Lid-inlet | 7 ft 10 in. x 5 ft 7 in. x 5 ft 7 in. |
| 1500 gal. Standard Two-Compartment Tank | 54 in. inlet | 11 ft 8 in. x 5 ft 7 in. x 5 ft 7 in. |
| 2000 gal. Lid-Inlet Two-Compartment Tank | Lid-inlet | 11 ft 8 in. x 5 ft 7 in. x 5 ft 7 in. |
| 2800 gal. Standard Two-Compartment Tank | 88 in. inlet | 10 ft 9 in. x 5 ft 8 in. x 8 ft 0 in. |
| 3000 gal. Lid-Inlet Two-Compartment Tank | Lid-inlet | 10 ft 9 in. x 5 ft 8 in. x 8 ft 0 in. |
Infiltrator Systems Inc. Septic Tanks
| Model | Gallons / compartment | Inlet / dimensions |
|---|---|---|
| IM-540 | 500 gal. Single-Compartment | 47 in. inlet; 5 ft 6 in. x 5 ft 3 in. x 5 ft 5 in. |
| IM-1060 | 1000 gal. Single/Double-Compartment | 47 in. inlet; 10 ft 7 in. x 5 ft 3 in. x 5 ft 5 in. |
| IM-1530 | 1500 gal. Single/Double-Compartment | 47 in. inlet; 14 ft 8 in. x 5 ft 3 in. x 5 ft 5 in. |
Additional product notes: fiberglass tanks and poly tanks are also available; plastic leach field chambers are available; AAA Zoellner builds several custom precast concrete products.
Customer education
Items to avoid in onsite treatment systems.
An onsite treatment system relies on microbial action to treat wastewater. Some household products and practices disrupt that process and can cause poor performance, clogs, malfunction, or increased pump-out frequency.
Inert Materials
Plastic, rubber, scouring pads, dental floss, condoms, kitty litter, cigarette filters, bandages, hair, mop strings, lint, rags, cloths, and towels do not decompose in an onsite treatment system.
Paper Products
Disposable diapers, tampons, sanitary napkins, cotton swabs, paper towels, facial tissues, baby wipes, lotioned, scented or quilted toilet tissue, and moist toilet paper do not dissolve readily. Excessive toilet tissue at one time can lead to clogs or more frequent pump-outs.
Food Waste
Do not put animal fats and bones, grease, coffee grounds, citrus and melon rinds, corn cobs, or eggshells down the sink. Limit garbage disposal use. Spoiled dairy products and yeasts from home brewing or baking may interfere with the microbial process.
Cleaning Products
Antimicrobial soaps and automatic toilet disinfection tablets may kill organisms needed to consume waste. Do not empty mop buckets containing bleach down the sink.
Medications / Ailments
Do not flush expired medicines. Some disrupt treatment systems and many can eventually reach groundwater. Chemotherapy may require more frequent pump-out intervals or biological additives; contact an onsite treatment provider for guidance.
Commercial Additives
EPA and industry guidance report no evidence supporting additives for normally functioning systems. Some septic tank additives can harm the system.
Chemicals and Toxins
Avoid paint, paint thinner, solvents, volatile substances, drain cleaners, automotive fluids, fuels, pesticides, herbicides, fertilizers, metals, disinfectants, sanitizers, bleach, floor-stripping wastes, excessive household chemicals, and backwash from water softener regeneration.
Laundry Practices
Spread laundry over the week instead of doing all loads in one day. Excessive detergents, especially bleach detergents, can affect performance. Liquid detergents are recommended over powders. Fabric softener sheets are recommended over liquid softeners. Use bleach sparingly and at half the labeled rate.
Manuals and documentation
Manuals and external documentation links.
Plan the system from the site conditions
Coordinate treatment type, tank size, risers, field options, delivery access, and soil testing before installation.
Call the nearest plant with the jobsite location, expected daily flow, permit requirements, soil information, access constraints, and any tank, riser, field, or component needs.