Precast concrete septic tanks are cost-effective, green, and durable. Precast concrete tanks are more robust than tanks made of steel, plastic material, fiberglass, or high-density polyethylene and provide an extended service life. Cement septic tanks steadily strengthen over time, these are watertight and heavy duty, making it the ideal preferred storage vessel for on-site septic storage and treatment. The overall thickness of sandwich wall membrane panels in commercial applications is typically 8 inches wide, but their designs tend to be customized to the application. In a typical 8-inch wall -panel the concrete wythes are each 2-3/8 inches wide thick), sandwiching 3-1/4 inches of high R-value insulating foam. The inside and external wythes of concrete are held along (through the insulation) with some form of joining system that is able to provide the needed structural integrity. Sandwich wall structure panels can be fabricated to the length and width desired, within functional restrictions dictated by the fabrication system, the strains of lifting and handling, and shipment constraints. Panels of 9-foot clear height are common, but heights up to 12 feet can be found.

We have also heard from time to time that Vacuum tests is not really a real life test.” Is this due to the fact tanks do not operate in vacuum pressure or that a vacuum test exerts a uniform pressure on all six sides of a fish tank, when the truth is soil and earth water loads range with depth? The truth is a vacuum test can be designed so that it approximates the utmost loads the tank will experience in the ground. Although this is a traditional approach, it generally does not reduce its validity.

Weight: A good concrete ensemble makes our tanks extremely heavy, this ensures the reservoir will never float” to the top over time, like some lighter weight tanks can do. Floating is a large problem, specifically from plastic tanks. These devices require anchoring preparation during the installation process because they are naturally buoyant. Cement does not have this issue, the material is heavy and stays on put for years.

On-site wastewater tanks release a clarified effluent by settling solid wastes and protecting against buoyant material from being discharged from the tank. Precast concrete on-site wastewater tanks operate effectively where municipal sewers aren't an option. Precast concrete provides durable watertight protection of watersheds to ensure surface and surface water quality.

With a particular gravity of 2.40, precast concrete on-site wastewater tanks withstand buoyant forces much better than tanks created from other materials. In comparison, fiberglass has a particular gravity of 1 1.86, while high-density polyethylene (HDPE) has a particular gravity of 0.97. Additionally labor-intensive and time-consuming on-site preparation is often required to anchor structures created from more buoyant materials.