SEWAGE TREATMENT / WASTEWATER TREATMENT installations using Darco Tanks must be engineered and approved for each specific application. Since the smallest septic tank we manufacture is 2700 gallons, our systems are normally too large for single family homes.

Darco wastewater treatment tanks are more likely to be used in commercial sites, restaurants, campgrounds, and other applications where process capacity is 2700 gallons or more. Darco Staff will work with your Wastewater Engineer to generate a design for approval by the local Authority Having Jurisdiction over on-site wastewater treatment and disposal systems.

Our tanks are also commonly used as sewage holding vaults where no public sewer is available and on-site treatment is not feasible. Sewage vaults generally run from 4,000 to 10,000 gallons in capacity. Vaults must also be engineered and approved for each specific application and site. Darco offers a modular "progressive fill" design that increases pumping efficiency and reduces operational expense.

Darco polyethylene OcTanks or fiberglass tanks are preferred by Building Officials in environmentally sensitive areas because they are manufactured as a one-piece vessel without seams, completely water tight, and unaffected by the acids generated from human waste which routinely attack concrete vaults.

Darco offers a variety of manway designs, a mechanical level gauge, and a high level (pump out) alarm.