Patent ID: 7311467

Claim:
A method of manually installing a string of arch shape cross section leaching chambers having sidewalls with a multiplicity of perforations for passage of water, for forming an interconnected string of chambers within a trench in soil; wherein the trench defines the path of said string and has a width sufficient to receive only a single string of chambers connected end-to-end, wherein each chamber has a first end and an opposing second end; wherein the first and second ends of adjacent chambers of the string connect with a load transferring joint; which method comprises the steps of (a) lifting a first chamber from the top of a stack of nested chambers; (b) placing the first chamber in said trench; (c) removing a second chamber from the top of a stack of nested chambers; (d) engaging the first end of the second chamber with the second end of the first chamber by vertically angling the second chamber relative to the first chamber and then lowering the second end of the second chamber into the trench to thereby form said joint between said chambers; wherein the person doing the manual installing stands in the trench and manipulates the second chamber during step (d); wherein the length of each chamber is at least 4 feet and no greater than 5.7 feet; and wherein each chamber has a flexibility factor of greater than about 0.2 inch.