Put that in your pipe and smoke it...or not

Discovered roots from one of my largest, oldest (over 200 years) Ponderosas has invaded my sewer line to the septic tank. Advised to cut down that tree that looms over my house many times. No way....the tree stays. A new pipe, impervious to roots (so sayeth the digger-man) is installed and buried. Bank account drained. Black water drains into tank. All is well... :-)