I have a broken clean-out valve between the house and the septic tank. Suggestions?

For over a year it has been taped to the main septic line with electrical tape and had cliche packed around it to keep it stable. Are there any better ways to fix this clean-out? The main line is broken and the clean-out sits neatly in the hole. The black electrical tape covered the juncture and went around a re-bar metal stake used to stabilize it before packing the cliche around it. The septic tank filled with water from the drain field following heavy rains recently, and I had to check the line for clogs. Now I have to put the clean-out back and I am asking for an easy fix.