Septic Tank Suppliers: Buying Tanks and Parts
Short answer: septic tanks are sold by precast concrete plants, plastic and fiberglass tank manufacturers and the distributors and supply houses that stock them, often through your installer. Concrete tanks come from a plant within delivery range and are set by a boom truck; plastic and fiberglass tanks are light enough to ship farther and carry onto tight sites. Compare the delivered price, the lead time and whether the model is approved in your state. landplan.io lists septic companies by state, their products and a price index of delivered prices.
This guide is for installers, designers and owners buying a tank and the parts that go with it.
Who sells septic tanks
| Seller | What they sell | How you usually buy |
|---|---|---|
| Precast concrete plants | Concrete septic, pump and holding tanks, distribution boxes, risers | Direct or through the installer; delivered and set |
| Plastic (polyethylene) tank manufacturers | One- and two-compartment tanks, pump tanks | Through distributors and supply houses |
| Fiberglass tank manufacturers | Septic and pump tanks, often larger sizes | Through distributors |
| Wastewater and plumbing distributors | Tanks, pipe, fittings, chambers, pumps, panels, filters, risers | Counter or delivery, often trade accounts |
| Treatment unit makers and their dealers | Aerobic units, media filters, disinfection | Through certified dealers or installers |
| Aggregate and sand yards | Stone, sand fill, topsoil | Picked up or delivered by the ton |
| Installers | The whole system, supplied and installed | One price for parts and labor |
Many homeowners never buy a tank directly: the installer orders it. Knowing the supply side still helps you read a quote.
Concrete vs plastic vs fiberglass tanks
The EPA notes that septic tanks are usually made of concrete, fiberglass, or polyethylene. Each has trade-offs:
| Concrete | Polyethylene (plastic) | Fiberglass | |
|---|---|---|---|
| Weight | Very heavy; needs a boom truck or crane | Light; small equipment or a few people can place it | Light |
| Delivery | From a plant within a delivery radius | Can ship long distances | Can ship long distances |
| Site access | Truck must get close to the hole | Works on tight or remote sites | Works on tight or remote sites |
| High water table | Weight helps resist floating | Needs anchoring or ballast per the maker's instructions | Needs anchoring per the maker's instructions |
| Installation care | Watertight joints and seals | Backfill and burial depth per the maker; can deform if installed wrong | Backfill per the maker |
| Approvals | Plant and design approvals vary by state | Model approvals vary by state | Model approvals vary by state |
Which is cheaper depends on the size, the market and the distance. Concrete is often the low-cost choice near a plant; far from one, delivery can change that. Our docs note that plastic and fiberglass tanks often cost more than concrete before delivery. Compare delivered prices for your site rather than going by rules of thumb.
Delivery: the hidden part of the price
A septic tank's delivered price includes getting it to the hole:
- Free delivery zones. Many precast plants deliver free within a set distance and charge per mile beyond it.
- Boom truck setting. A heavy tank, or one set far from the driveway, needs a boom truck or crane, often a separate charge.
- Pickup prices. Pipe, stone and sand are often priced at the yard; trucking is extra.
- Beyond range. Some suppliers won't deliver past a certain distance at all.
Ask for the delivered and set price to your address, not the list price.
Approved products
Many states keep an approved product list, especially for tanks, chambers, gravelless media and treatment units. A tank that is fine in one state may not be approved in the next, and some states approve specific plants or models. Your designer specifies an approved model; if the installer substitutes one, it should be equally approved, and the reviewer may need to know.
The rest of the supply list
A septic system needs more than a tank. A typical order includes some of:
- Building sewer pipe and fittings, usually PVC.
- Effluent filter for the tank outlet, where required.
- Risers and lids to bring access to the surface.
- Distribution box, or for pressure systems a pump, floats, control panel and alarm, and the force main.
- Drain field media: washed stone, or a gravelless product such as chambers.
- Perforated pipe or pressure laterals with orifice shields.
- Sand fill for mounds and at-grade systems, by the ton.
- Geotextile fabric and observation ports.
- Treatment unit and its controls, where the design calls for one.
How to compare suppliers
- Start from the design. The size, material and approval of the tank come from the design and your state.
- Find who stocks it near the site. Distance drives delivery cost and lead time.
- Compare delivered prices, including setting and any per-mile charges.
- Check lead time. Precast plants can have waits in the busy season.
- Check how recent the price is. Prices change; a quote from last year may not stand.
The price index shows the median delivered price and typical range for each product type, nationally and by state (for example Ohio), from distributors' listings on landplan.io. Use it to sanity-check a quote. How much catalog and price data we have, by state, is on the data coverage page.
How landplan.io connects designs to suppliers
landplan.io keeps a catalog of septic products and the manufacturers and distributors that sell them, with their prices, stock and delivery areas:
- Products: search tanks, distribution products, pumps and controls, treatment units, sand and stone. Each result shows its nearest seller, the distance, whether it's delivered to your site or pickup only, and its price.
- Septic companies by state: manufacturers, distributors and installers, with a page for each company.
- In the design: when you add a tank, landplan.io lists tanks that distributors near the site stock. Each part in the design can have its distributor, and Find a distributor sorts them by delivered cost and distance, with stock, delivery days and when the price was checked.
- Cost estimate: the estimate adds an approximate delivery per seller, from the seller's own free zone and per-mile rate where known.
Docs: Distributors and Products, Septic Tank Tools and Cost Estimate.
For suppliers
If you make or distribute septic products, list them: designers then see your products, with your price, when they design near your yard. Claim your company with a work email, then import a price list or add products one by one. See Your Company.
Frequently asked questions
Can I buy a septic tank myself?
Often, yes, from a precast plant or a distributor, but check that the model is approved in your state and that your installer will set it. Many installers prefer to supply the tank.
How much does a septic tank cost?
It depends on the size, the material and the delivery. See current delivered prices by state on the price index, and Septic System Cost for the whole system.
Are plastic septic tanks allowed everywhere?
No. Approvals are by state, and some states restrict materials or models. Check your state's approved list.
How far will a precast plant deliver?
Each plant sets its own range and charges. Ask for the delivered and set price to your address.
What size tank should I buy?
The size your state's rules require for the bedrooms, from the design. See Septic Tank Size.
Design it from your address
Create a free account, type the address, and landplan.io designs the system with real products that distributors near the site stock, and prices them delivered.