I am preparing to remove and install a new leach bed on my existing tank.  The only difficulty I can see is that I don’t know what to connect the new pipe to the concrete distribution box with.  I am guessing that a fernco coupling would probably do but I am not sure.  The reason I am replacing the system was a 100′ tall willow tree infested the leach bed rendering 3 of the 5 lines useless.  The tree has since been evicted but the lines are clay tile so I don’t know the exact condition of the ends if each line.

Thanks, Dustin