| 20090008837 | BLOW MOLDED SEPTIC TANK METHOD OF MANUFACTURE - 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. | 01-08-2009 |
