Abstract: A method of forming a septic tank from a blow molded body having an interior and an exterior. The septic tank body is formed from one or more layers of plastic material that are chosen for their chemical, mechanical or other properties. The septic tank body includes a plurality of integral ribs to provide circumferential structurally rigidity and also includes compression molded flange portions to provide axial structural rigidity.
Abstract: A septic tank cover formed of a blow molded body having an interior and an exterior. The septic tank cover body is formed from one or more layers of plastic material that are chosen for their chemical, mechanical or other properties. The septic tank cover body includes a port for inserting ballast or insulation into the interior of the cover. Additionally, septic tank cover includes non-slip and locking features.
Abstract: A septic tank formed of a blow molded body having an interior and an exterior. The septic tank body is formed from one or more layers of plastic material that are chosen for their chemical, mechanical or other properties. The septic tank body includes a plurality of integral ribs to provide circumferential structurally rigidity and also includes compression molded flange portions to provide axial structural rigidity. Additionally, septic tank covers and riser systems are provided.