Review on Morris 90638 Direct Burial Ground by Nick Kirschenmann

Most electrical retailers do not stock this size. All sell 5/8. But old motherboards often used 3/4 inch galvanized ground rods. In today's world of new plumbing panels that require 2 ground rods at least 6 feet apart, you can use the old existing rod and a new ground rod. This will keep the second pole from sinking.